D'Eustachio P, Bothwell A L, Takaro T K, Baltimore D, Ruddle F H
J Exp Med. 1981 Apr 1;153(4):793-800. doi: 10.1084/jem.153.4.793.
To determine the chromosomal localization of murine lambda light (L) chain structural genes, DNA from a panel of 11 mouse x hamster somatic cell hybrids was scored for the presence of sequences homologous to cloned lambda DNA probe molecules. Six of the hybrids had detectable lambda I and lambda II gene sequences. In all six, the full complement of murine sequences was present, and in its germline configuration. The remaining hybrids lacked any detectable murine lambda L chain gene sequences. The only mouse chromosome present in all of the positive hybrids and absent from the negative ones was number 16, allowing the assignment of lambda L chain structural genes to this chromosome. Together with the previous assignments of the kappa L chain genes to chromosome 6 and heavy chain genes to chromosome 12, this finding completes the mapping of Ig structural genes in the mouse at the chromosomal level.
为确定小鼠λ轻(L)链结构基因的染色体定位,对一组11个小鼠×仓鼠体细胞杂种的DNA进行检测,以寻找与克隆的λDNA探针分子同源的序列。其中6个杂种含有可检测到的λI和λII基因序列。在所有这6个杂种中,完整的小鼠序列均存在,且呈种系构型。其余杂种未检测到任何小鼠λL链基因序列。所有阳性杂种中均存在而阴性杂种中均不存在的唯一小鼠染色体是16号染色体,从而将λL链结构基因定位于此染色体。连同先前将κL链基因定位于6号染色体以及重链基因定位于12号染色体的结果,这一发现完成了小鼠免疫球蛋白结构基因在染色体水平上的图谱绘制。