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Proteins & Protein Expression

Cosmo Bio USA offers a comprehensive and expertly curated Proteins & Protein Expression portfolio, supporting a wide range of research in molecular biology, proteomics, immunology, regenerative medicine, and synthetic biology. Cosmo Bio Co., Ltd. supplies a broad selection of recombinant proteins—cytokines, growth factors, enzymes, and fusion-tagged proteins—for functional assays, signaling studies, and protein–protein interaction analysis. CUSABIO adds a vast catalog of recombinant proteins validated for high-impact targets in cancer, immunology, neuroscience, and infectious disease, enabling reliable performance in both biochemical and cell-based assays. CUSAg enhances assay development with specialized recombinant proteins and small molecule–protein conjugates, ideal for sensitive detection in food safety and contaminant screening applications.

Cellular Engineering Technologies (CET) advances the offering with yeast-derived, xeno-free human growth factors such as M-CSF and RANKL—tailored for iPSC maintenance and osteoclast differentiation under defined, animal-free conditions. MBL International delivers essential immunology proteins, including MHC monomers and tetramers for antigen-specific T cell detection and vaccine research. Atlas Antibodies supports antibody validation and assay standardization with its recombinant PrEST antigens. Home Algae Biotechnology introduces algae-derived fluorescent proteins for sustainable, innovative bioimaging and biosensor applications. GSK completes the portfolio with the PUREfrex® system, a high-fidelity, cell-free protein synthesis platform ideal for precise protein expression, synthetic biology, and minimal cell system construction. Together, these rigorously validated tools position Cosmo Bio USA as a trusted provider of efficient, scalable, and application-specific protein research solutions across the life sciences.

 

  • Angiotensin-converting enzyme 2 (ACE2) protein

    Cosmo Bio

    Angiotensin-converting enzyme 2 (ACE2) protein

    Catalog No.(s): HAK-ACE2_UL-1

    Product DescriptionWhen the new coronavirus infects a cell, the spike protein on the surface of the virus binds to ACE2 on the cell surface. Drugs that block this binding will prevent viral infection. ACE2 extracellular domain SARS-CoV-2 spike protein...

    $953.00
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  • Recombinant Human R-spondin 1

    MBL Life Sciences

    Recombinant Human R-spondin 1

    Catalog No.(s): MBL-J2-004

    Product DescriptionR-spondin 1 (roof plate-specific spondin 1), also known as Christine 3, is one of the R-spondin family members that regulates to the activation of canonical WNT/β-catenin signaling. In the absence of R-spondin, Frizzled (Fz) is...

    $746.00
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  • MBL Life Sciences

    FGF-Max (Recombinant human FGF-1/FGF-2 chimera)

    Catalog No.(s): MBL-J2-003

    Product DescriptionRecombinant chimeric protein of FGF-1 (FGF-acidic) and FGF-2 (FGF-basic) expressed in E. coli. If you are to use this product in combination with other factor or factors (hereunder factors) when culturing organoids, stem cells, or...

    $645.00
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  • Recombinant Afamin/Wnt3a

    MBL Life Sciences

    Recombinant Afamin/Wnt3a

    Catalog No.(s): MBL-J2-002

    Product DescriptionRecombinant Wnt3a protein and Afamin protein. The N-terminal PA tagged mouse Wnt3a and the N-terminal Myc tagged human Afamin were co-expressed in CHO-K1 cells. Note: We recommend the addition of albumin to dilution buffer to improve...

    $637.00
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  • CircuLex LDLR EGF-AB domain

    MBL Life Sciences

    CircuLex LDLR EGF-AB domain

    Catalog No.(s): MBL-CY-R2340

    Product DescriptionCircuLex LDLR EGF-AB domain of 50 µg and The LDLR EGF-AB domain demonstrates ~15 kDa by SDS-PAGE analysis.Product Specifications Product Specifications Purity The LDLR EGF-AB domain is greater than 90% pure as...

    $710.00
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  • CircuLex PCSK9 R194A (Human)

    MBL Life Sciences

    CircuLex PCSK9 R194A (Human)

    Catalog No.(s): MBL-CY-R2333

    Product DescriptionCircuLex PCSK9 R194A (Human) of 20 μg and The PCSK9 R194A demonstrates 64 kDa (catalytic and C-terminal domain) and 16 kDa (prodomain) by SDS-PAGE analysis.Product Specifications Product Specifications Gene...

    $639.00
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  • CircuLex PCSK9 D374Y (His-tagged)

    MBL Life Sciences

    CircuLex PCSK9 D374Y (His-tagged)

    Catalog No.(s): MBL-CY-R2331

    Product DescriptionCircuLex PCSK9 D374Y (His-tagged) of 10 µg and The PCSK9 D374Y demonstrates 64 kDa (catalytic and C-terminal domain) and 16 kDa (prodomain band) by SDS-PAGE analysis.Product Specifications Product...

    $710.00
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  • CircuLex PCSK9 Wild Type

    MBL Life Sciences

    CircuLex PCSK9 Wild Type

    Catalog No.(s): MBL-CY-R2330

    Product DescriptionCircuLex PCSK9 Wild Type of 50 µg and The PCSK9 Wild Type demonstrates 62 kDa (catalytic and C-terminal domain) and 16 kDa (prodomain band) by SDS-PAGE analysis.Product Specifications Product...

    $639.00
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  • CircuLex PCSK9 D374Y in culture medium

    MBL Life Sciences

    CircuLex PCSK9 D374Y in culture medium

    Catalog No.(s): MBL-CY-R2311

    Product DescriptionPCSK9 binds to the LDL receptor in vitro and in vitro. Human PCSK9 D374Y containing a C-terminal His-tag, expressed in HEK 293 cells. Binding capability to EGF-AB domain of LDL receptor was confirmed by using CircuLex PCSK9-LDLR in...

    $355.00
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  • Mouse ISG15 Recombinant Protein

    MBL Life Sciences

    Mouse ISG15 Recombinant Protein

    Catalog No.(s): MBL-CY-R2274

    Product DescriptionProduct Specifications Product Specifications Purity Purity is over 90% estimated by SDS-PAGE analysis Formulation Recombinant mouse ISG15 is supplied frozen in phosphate buffered saline (PBS) containing...

    $452.00
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  • CircuLex Human AIM/CD5L/Spα

    MBL Life Sciences

    CircuLex Human AIM/CD5L/Spα

    Catalog No.(s): MBL-CY-R2270

    Product DescriptionCircuLex Human AIM/CD5L/Spα. The human AIM/CD5L/Spα demonstrates 43 kDa by SDS-PAGE analysis.Product Specifications Product Specifications Purity > 95 % pure as determined by SDS-PAGE analysis...

    $639.00
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  • NAMPT (Human,   Active)

    MBL Life Sciences

    NAMPT (Human, Active)

    Catalog No.(s): MBL-CY-E1251

    Product DescriptionNAMPT (Human, Active) of 100 μg and weighing 56 kDa.Product Specifications Product Specifications Formulation Recombinant NAMPT is supplied frozen in a buffer containing 20 mM Hepes-KOH, pH 7.5, 1 mM...

    $510.00
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  • cGK Positive Control (Catalytic Domain)

    MBL Life Sciences

    cGK Positive Control (Catalytic Domain)

    Catalog No.(s): MBL-CY-E1161-1

    Product DescriptioncGK Positive Control (Catalytic Domain) of 200 assays and Recombinant cGMP-Dependent Protein Kinase demonstrates a single 64 kDa band by SDS-PAGE analysis.Product Specifications Product...

    $329.00
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  • Recombinant Mouse IL-18 (without BSA)

    MBL Life Sciences

    Recombinant Mouse IL-18 (without BSA)

    Catalog No.(s): MBL-B004-5, MBL-B004-2

    Product DescriptionIL-18 Protein of 25 µg. cDNA encoding the matured mouse IL-18 protein sequence (corresponding to 36-192 aa) was expressed in E. coli.Product Specifications Product Specifications Source Mouse Gene ID -...

    $362.00 - $1,483.00
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  • Recombinant Human IL-18 (without BSA)

    MBL Life Sciences

    Recombinant Human IL-18 (without BSA)

    Catalog No.(s): MBL-B003-5, MBL-B003-2

    Product DescriptionIL-18 Protein of 25 µg.Product Specifications Product Specifications Gene ID - Human 10068 Molecular Weight 18 kDa Purity Greater than 90% purity as confirmed on SDS-PAGE by Coomassie brilliant blue...

    $355.00 - $1,483.00
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  • Recombinant Mouse IL-18

    MBL Life Sciences

    Recombinant Mouse IL-18

    Catalog No.(s): MBL-B002-5

    Product DescriptionIL-18 Protein of 25 µg.Product Specifications Product Specifications Gene ID - Human 10068 Molecular Weight 18 kDa Endotoxin Levels Less than 0.1 ng/µg of recombinant mouse IL-18 protein, measured by the LAL...

    $362.00
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  • Recombinant Human IL-18

    MBL Life Sciences

    Recombinant Human IL-18

    Catalog No.(s): MBL-B001-5

    Product DescriptionProduct Specifications Product Specifications Molecular Weight 18 kDa Endotoxin Levels Less than 0.1 ng per 1 µg of recombinant human IL-18 protein, when measured by the LAL assay. Documents &...

    $355.00
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  • Ash-hAG [mTOR-FKBP12]

    MBL Life Sciences

    Ash-hAG [mTOR-FKBP12]

    Catalog No.(s): MBL-AM-8202M

    Product DescriptionProduct SpecificationsDocuments & Links Documents & Links for Ash-hAG [mTOR-FKBP12] Datasheet Ash-hAG [mTOR-FKBP12] Datasheet Documents & Links for Ash-hAG [mTOR-FKBP12] Datasheet Ash-hAG [mTOR-FKBP12]...

    $811.00
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  • Ash-hAG [p53-MDM2]

    MBL Life Sciences

    Ash-hAG [p53-MDM2]

    Catalog No.(s): MBL-AM-8201M

    Product DescriptionProduct SpecificationsDocuments & Links Documents & Links for Ash-hAG [p53-MDM2] Datasheet Ash-hAG [p53-MDM2] Datasheet Documents & Links for Ash-hAG [p53-MDM2] Datasheet Ash-hAG [p53-MDM2]...

    $811.00
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  • Annexin V-PE (Reagent)

    MBL Life Sciences

    Annexin V-PE (Reagent)

    Catalog No.(s): MBL-4696-100

    Product DescriptionAnnexin V-PE reagent of 100 tests for studying apoptosis.Product Specifications Product Specifications Application FC Gene ID - Human 308 Gene ID - Mouse 11747 Formulation Phycoerythrin (PE) conjugated...

    $379.00
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  • Recombinant hTIMP-2 (CSR-Y-9)

    Cosmo Bio

    Recombinant hTIMP-2 (CSR-Y-9)

    Catalog No.(s): CSR-Y-9

    Product DescriptionProduct SpecificationsDocuments & Links Documents & Links for Recombinant hTIMP-2 (CSR-Y-9) Datasheet Recombinant hTIMP-2 (CSR-Y-9) Datasheet Documents & Links for Recombinant hTIMP-2 (CSR-Y-9) Datasheet Recombinant...

    $720.00
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  • Recombinant hTIMP-1 (CSR-Y-8)

    Cosmo Bio

    Recombinant hTIMP-1 (CSR-Y-8)

    Catalog No.(s): CSR-Y-8

    Product DescriptionProduct SpecificationsDocuments & Links Documents & Links for Recombinant hTIMP-1 (CSR-Y-8) Datasheet Recombinant hTIMP-1 (CSR-Y-8) Datasheet Documents & Links for Recombinant hTIMP-1 (CSR-Y-8) Datasheet Recombinant...

    $720.00
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  • Type VI Collagen (CSR-Y-5)

    Cosmo Bio

    Type VI Collagen (CSR-Y-5)

    Catalog No.(s): CSR-Y-5

    Product DescriptionProduct SpecificationsDocuments & Links Documents & Links for Type VI Collagen (CSR-Y-5) Datasheet Type VI Collagen (CSR-Y-5) Datasheet Documents & Links for Type VI Collagen (CSR-Y-5) Datasheet Type VI Collagen...

    $276.00
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  • Type V Collagen (CSR-Y-4)

    Cosmo Bio

    Type V Collagen (CSR-Y-4)

    Catalog No.(s): CSR-Y-4

    Product DescriptionProduct SpecificationsDocuments & Links Documents & Links for Type V Collagen (CSR-Y-4) Datasheet Type V Collagen (CSR-Y-4) Datasheet Documents & Links for Type V Collagen (CSR-Y-4) Datasheet Type V Collagen (CSR-Y-4)...

    $180.00
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  • Type IV Collagen (CSR-Y-3)

    Cosmo Bio

    Type IV Collagen (CSR-Y-3)

    Catalog No.(s): CSR-Y-3

    Product DescriptionProduct SpecificationsDocuments & Links Documents & Links for Type IV Collagen (CSR-Y-3) Datasheet Type IV Collagen (CSR-Y-3) Datasheet Documents & Links for Type IV Collagen (CSR-Y-3) Datasheet Type IV Collagen...

    $240.00
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  • Type III Collagen (CSR-Y-2)

    Cosmo Bio

    Type III Collagen (CSR-Y-2)

    Catalog No.(s): CSR-Y-2

    Product DescriptionProduct SpecificationsDocuments & Links Documents & Links for Type III Collagen (CSR-Y-2) Datasheet Type III Collagen (CSR-Y-2) Datasheet Documents & Links for Type III Collagen (CSR-Y-2) Datasheet Type III Collagen...

    $180.00
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  • Recombinant bTIMP-1 (CSR-Y-13)

    Cosmo Bio

    Recombinant bTIMP-1 (CSR-Y-13)

    Catalog No.(s): CSR-Y-13

    Product DescriptionProduct SpecificationsDocuments & Links Documents & Links for Recombinant bTIMP-1 (CSR-Y-13) Datasheet Recombinant bTIMP-1 (CSR-Y-13) Datasheet Documents & Links for Recombinant bTIMP-1 (CSR-Y-13) Datasheet Recombinant...

    $180.00
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  • Recombinant hTIMP-2 (CSR-Y-12)

    Cosmo Bio

    Recombinant hTIMP-2 (CSR-Y-12)

    Catalog No.(s): CSR-Y-12

    Product DescriptionProduct SpecificationsDocuments & Links Documents & Links for Recombinant hTIMP-2 (CSR-Y-12) Datasheet Recombinant hTIMP-2 (CSR-Y-12) Datasheet Documents & Links for Recombinant hTIMP-2 (CSR-Y-12) Datasheet Recombinant...

    $180.00
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  • Recombinant hTIMP-1 (CSR-Y-11)

    Cosmo Bio

    Recombinant hTIMP-1 (CSR-Y-11)

    Catalog No.(s): CSR-Y-11

    Product DescriptionProduct SpecificationsDocuments & Links Documents & Links for Recombinant hTIMP-1 (CSR-Y-11) Datasheet Recombinant hTIMP-1 (CSR-Y-11) Datasheet Documents & Links for Recombinant hTIMP-1 (CSR-Y-11) Datasheet Recombinant...

    $180.00
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  • Recombinant bTIMP-1 (CSR-Y-10)

    Cosmo Bio

    Recombinant bTIMP-1 (CSR-Y-10)

    Catalog No.(s): CSR-Y-10

    Product DescriptionProduct SpecificationsDocuments & Links Documents & Links for Recombinant bTIMP-1 (CSR-Y-10) Datasheet Recombinant bTIMP-1 (CSR-Y-10) Datasheet Documents & Links for Recombinant bTIMP-1 (CSR-Y-10) Datasheet Recombinant...

    $720.00
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  • Undenatured Collagen

    Cosmo Bio

    Undenatured Collagen

    Catalog No.(s): CSR-SNCUC10

    Product DescriptionProduct SpecificationsDocuments & Links Documents & Links for Undenatured Collagen Datasheet Undenatured Collagen Datasheet Documents & Links for Undenatured Collagen Datasheet Undenatured Collagen Datasheet

    $154.00
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  • Human Recombinant Transforming Growth Factor Beta 1 (TGF-β1) Protein

    Cellular Engineering Technologies

    Human Recombinant Transforming Growth Factor Beta 1 (TGF-β1) Protein

    Catalog No.(s): CET-GR1004-10, CET-GR1004-50, CET-GR1004-100

    Product DescriptionTransforming Growth Factor Beta 1 or TGF-β1 is a secreted protein that performs many cellular functions, including controlling cell growth, cell proliferation, cell differentiation, and apoptosis. TGF-β1 is used extensively...

    $187.00 - $994.00
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