Coli strain HB2151 for expression of solublechimeric Fab fragments. The chimeric SZ-51 Fab frag-ments were proved to bind specifically to GMP-140 bywestern blot.

• 表达的嵌合抗体Fab片段为可溶性，经Westernblot证实能特异地与GMP－140呈结合反应。