Friedenson B, Tung A S, Nisonoff A
Proc Natl Acad Sci U S A. 1975 Sep;72(9):3676-9. doi: 10.1073/pnas.72.9.3676.
Amino-terminal amino-acid sequences were determined for the heavy (H) chains of anti-p-azophenylarsonate antibodies with shared idiotype, isolated from nine individual A/J mice. Mice chosen for investigation were those producing high titers of antibody with the cross-reactive idiotype. The antibodies were further enriched for the idiotype by isoelectric focusing. The H chains are largely or entirely unblocked at the N-terminus and appear by sequence analysis to be greatly restricted in heterogeneity. All N-terminal sequences were found to be identical. The results suggest that the framework (nonhypervariable) sequence is determined by a germ line gene and is not influenced by somatic processes.
测定了从9只个体A/J小鼠中分离出的具有共同独特型的抗对氨基苯砷酸抗体重链(H链)的氨基末端氨基酸序列。被选来进行研究的小鼠是那些产生高滴度具有交叉反应独特型抗体的小鼠。通过等电聚焦进一步富集抗体中的独特型。H链在N末端大部分或完全未被封闭,并且通过序列分析显示其异质性受到极大限制。所有的N末端序列都被发现是相同的。结果表明,构架(非高变)序列由种系基因决定,不受体细胞过程影响。