Crystal structures are shown in ribbon mode. (A) CGL1/FREE: CGL1 purified from Crassostrea gigas, dialyzed against TBS, and concentrated to 5 mg/mL; (B) CGL1/MAN: CGL1 purified from C. gigas, undialyzed, and concentrated to 10 mg/mL; and (C) CGL1/MAN2: CGL1 purified after...