Fab Antibody Expression Service

KMD Bioscience has deeply integrated its established recombinant antibody expression services with phage display technology, enabling the production of recombinant antibodies spanning diverse origins, including fully human, humanized, chimeric, and murine antibodies. Based on the host cell type, protein expression systems are broadly classified into prokaryotic and eukaryotic systems. Among these, the prokaryotic system employs E. coli as the host, offering advantages such as simple handling and low cost, allowing for large‑scale production of Fab antibodies within a short turnaround time. By optimizing process parameters—including induction duration, expression temperature, and inducer concentration—we ensure that Fab antibodies are expressed in a soluble form while retaining full biological activity. Eukaryotic expression systems encompass a variety of hosts, including mammalian, yeast, and insect cells, which enable post‑translational modifications and yield Fab antibodies with structural and functional properties closer to their native state. Furthermore, through targeted engineering of expression vectors and systematic optimization of the expression system, we can further enhance the expression titers and purification efficiency of Fab antibodies.

Mammalian expression systems typically employ either transient or stable expression strategies. These systems closely mimic the natural expression and modification processes of proteins, and leverage highly efficient transcription and translation machinery to achieve high‑level production of the target protein. KMD Bioscience utilizes well‑established mammalian cell lines such as HEK293 and CHO, and systematically optimizes multiple parameters including media formulations, expression vector elements, and transfection conditions. This enables scalable production of Fab antibodies suitable for drug development and biopharmaceutical R&D, ensuring that the final products exhibit both high biological activity and excellent batch‑to‑batch consistency.

--Fab can be expressed through mammalian cells with high protein yield.

--Expression of Fab antibody with strong activity and good specificity.

--Soluble Fab antibody can be expressed in large quantities through E. coli system.

--Functional study of Fab antibody in vitro and in vivo

--Can humanize Fab

--Synthetic and semi-synthetic Fab antibodies can be expressed