抗体可变区的空间结构 hypervariable regions CDR of heavy chain 框架区 antigen-biding site 框架区 hypervariable regions of light chain Sources from Molecular Biology of the Cell V.Cells in Their Social Context 24.The Adaptive Immune System B Cells and Antibodies Sources from Molecular Biology of the Cell V. Cells in Their Social Context 24. The Adaptive Immune System B Cells and Antibodies 框架区 框架区 CDR 抗体可变区的空间结构