| 单词 | C4 b |
| 释义 | C4 b《英文msh词典》C4 b [入口词] C4 b [主题词] Complement 4b [英文释义] Larger fragment formed when C1s splits C4 into C4a and C4b. C4b combines with C2b to form the activated C4b2b complex which is often called the classical pathway C3 convertase. |
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