Smith G P
Biochem J. 1978 May 1;171(2):337-47. doi: 10.1042/bj1710337.
MPC 11 mouse myeloma cells synthesize two immunoglobulin kappa light chains, coded by two separate genes. One of these Kappa-chains has no variable region and is degraded intracellularly. The other is a full-length kappa-chain contaning both variable and constant regions: this chain is secreted, both by itself and combined with heavy chains in molecules of immunoglobulin G. This paper reports the amino acid sequence of the myeloma MPC 11 full-length kappa-chain. The chain is unusual in having 12 extra residues at its N-terminus when its sequence is aligned with those of other mouse kappa-chains; no other anomalies were found in its sequence.
MPC 11小鼠骨髓瘤细胞合成两种免疫球蛋白κ轻链,由两个不同的基因编码。其中一种κ链没有可变区,在细胞内被降解。另一种是包含可变区和恒定区的全长κ链:该链可单独分泌,也可与免疫球蛋白G分子中的重链结合后分泌。本文报道了骨髓瘤MPC 11全长κ链的氨基酸序列。当该链的序列与其他小鼠κ链的序列比对时,其N端有12个额外的残基,这一点不同寻常;在其序列中未发现其他异常。