THE ANTIBODY IS SECRETED INTO PERIPLASMIC SPACE. VH AND VL DOMAINS ARE COVALENTLY LINKED AND THEY ...THE ANTIBODY IS SECRETED INTO PERIPLASMIC SPACE. VH AND VL DOMAINS ARE COVALENTLY LINKED AND THEY ASSOCIATE SPONTANEOUSLY. CHAIN IDENTIFIER *L* STANDS FOR LIGHT-CHAIN RESIDUES, *H* FOR HEAVY-CHAIN RESIDUES. THE NUMBERING SYSTEM USED IN THIS ENTRY IS SEQUENTIAL, FROM 1 - 107 FOR THE LIGHT CHAIN AND FROM 201 - 316 FOR THE HEAVY CHAIN. PRO L 95 IS TRANS IN THIS DELETION MUTANT.