| 释义 |
heavy chainn.（名词）- The larger of the two types of polypeptide chains in immunoglobulins, consisting of an antigen-binding portion having a variable amino acid sequence, and a constant region that defines the antibody class.重链：两类免疫球蛋白多肽链中较大的一类，由具有变动胺基酸序列的带抗原部分以及定义抗体类的恒定区组成
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