| 摘要 |
Improved expression of active antibody fragments (Fabs) is achieved by truncating a heavy chain constant region. Truncation of the CHI domain of a Fab fragment can increase yield of soluble active antibody fragment in Pseudomonas fluorescens. Another embodiment of the invention includes secretion of the light chain and a fragment of the heavy chain with various C-termini (e.g., VH-CHI truncated to different lengths). The truncated CHI region can be used as a scaffold to create other Fabs. Also included is truncation of the kappa light chain and/or lambda light chain domains of a Fab fragment. The invention also includes expression of Fab fragments fused to other peptides or molecules (e.g., toxins, proteins, peptides, enzymes, etc.).
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