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Recombinant Serum Albumin

Recombinant Serum Albumin
Introduction

Serum albumin (SA) is one of the most abundant and stable proteins in blood. As such, fusion proteins for biopharmaceutics have mostly focused on developing albumin-based constructs due to its high stability, easy construction, and stable formulation. Albumin fusion proteins result in a function protein that prolongs the half-life of drugs through the recycling mechanism mediated by neonatal Fc receptor (FcRn). FcRn is responsible for the transport of albumin across endothelial barriers, such as the blood-brain barrier and the placenta and is also involved in the uptake and recycling of IgG antibodies. The interaction between FcRn and albumin occurs primarily in the acidic environment of the endosome, where the low pH triggers a conformational change in FcRn that allows it to bind to albumin and IgG. Many drugs take advantage of the protection mechanism of FcRn against IgG and human SA (HSA) by fusing/coupling with IgG Fc or HSA to extend their half-life and improve pharmacokinetics. In addition to using HSA as a fusion partner, many pharmaceutical companies are targeting HSA using bispecific or multiple antibodies to bind to HSA and prolong the half-life of drugs.

To facilitate the development of HSA antibody drugs and HSA fusion protein drugs, ACROBiosystems is offering a series of recombinant Serum Albumin products that have been validated in binding to FcRn proteins and can be used as antibody drug targets and fusion protein drug isotype controls.

Product List
Molecule Cat. No. Species Product Description Preorder/Order
Product Features

Sequence Integrity: Protein sequence is complete with the signal peptide and pre-peptide removed.

High Purity: Protein purity is verified to be greater than 95% by SDS-PAGE.

Various Species Available: Human, Mouse, Cynomolgus and Rabbit species.

Bioactivity Validated: FcRn binding activity is validated with protocols available to download.

Verification Data
High purity and structural homogeneity verified by SDS-PAGE and SEC-MALS
High purity and structural homogeneity verified by SDS-PAGE and SEC-MALS

Human Serum Albumin, His Tag (Cat. No. HSA-H5220) on SDS-PAGE under reducing (R) condition. The purity of the protein is greater than 95%. As verified by SEC-MALS, the purity is more than 90% and the molecular weight of this protein is around 60-75 kDa.

High purity and structural homogeneity verified by SDS-PAGE and SEC-MALS

Human Serum Albumin, His Tag (Cat. No. HSA-H522a) on SDS-PAGE under reducing (R) condition. The purity of the protein is greater than 95%. As verified by SEC-MALS, the purity is more than 90% and the molecular weight of this protein is around 60-75 kDa.

High biological activity verified by SPR & BLI

High biological activity verified by SPR & BLI

Human Serum Albumin Protein, His Tag (Cat. No. HSA-H5220) immobilized on CM4 Chip can bind Human FCGRT&B2M Heterodimer Protein, His Tag (Cat. No. FCN-H52W7) with an affinity constant of 0.381 μM as determined in a SPR assay (Biacore T200) (Routinely tested).

High biological activity verified by SPR & BLI

Mouse Serum Albumin, His Tag (Cat. No. MSA-M52H8) immobilized on CM5 Chip can bind Mouse FCGRT&B2M Heterodimer Protein, His Tag (Cat. No. FCM-M52W8) with an affinity constant of 0.165 μM as determined in a SPR assay (Biacore T200) (Routinely tested).

High biological activity verified by SPR & BLI

Loaded Biotinylated Human FCGRT&B2M Heterodimer Protein, His,Avitag (Cat. No. FCM-H82W7) on SA Biosensor, can bind Human Serum Albumin, His Tag (Cat. No. HSA-H5220) with an affinity constant of 0.647 μM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).

High biological activity verified by SPR & BLI

Loaded Biotinylated Human Serum Albumin, His,Avitag (Cat. No. HSA-H82E3) on SA Biosensor, can bind Human FCGRT&B2M Heterodimer Protein, His Tag&Strep II Tag (Cat. No. FCM-H5286) with an affinity constant of 0.641 μM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).

ACRO Quality

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