| An opsonin generally is a protein substance, such as one of the circulating immunoglobulins or complement components. |
| They appear to be more or less specific, a separate opsonin being necessary for phagocytosis of each species of bacteria. |
| In the case of diphtheria, the antitoxin appears to be more efficacious than an opsonin. |
| Complement was used as opsonin for the NBT test and was provided using fresh pooled human serum. |
| Key to the technology is a genetically engineered protein that is based on a naturally occurring human opsonin protein called Mannose Binding Lectin. |
| Mineral-binding osteopontin also serves as an opsonin, facilitating clearance by macrophages of mineralized bone debris particles at surgical drill sites. |
