单词 | C4 a |
释义 | C4 a《英文msh词典》C4 a [入口词] C4 a [主题词] Complement 4a [英文释义] Smaller fragment formed when C1s splits C4 into C4a and C4b. As an anaphylatoxin,C4a causes symptoms of immediate hypersensitivity but it has weaker activity than C3a or C5a. |
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