opsonin

Introduction

A serum protein (usually antibody) that binds to specific antigen & sensitizes it in such a manner that it is more readily engulfed by phagocytes.

More general terms

• plasma protein
• bioagent

More specific terms

• alpha-2-HS-glycoprotein; alpha-2-Z-globulin; Ba-alpha-2-glycoprotein; fetuin-A (AHSG, FETUA, PRO2743)
• complement C3b
• complement C3b-inactivated
• lipopolysaccharide-binding protein (LBP)