Morizot D C, Greenspan J A, Siciliano M J
Biochem Genet. 1983 Oct;21(9-10):1041-9. doi: 10.1007/BF00483958.
Electrophoretic variation ascribable to three protein-coding loci, coding for glutamine synthetase (GS), uridine monophosphate kinase (UMPK), and transferrin (Tf), was observed in three species of fish of the genus Xiphophorus. Electrophoretic patterns in interspecific F1 hybrid heterozygotes suggested monomeric subunit structures of UMPK and Tf and a multimeric structure of undetermined subunit number of GS. Linkage analyses in backcross hybrids indicated a recombination map of GS-0%-Tf-10.8%-UMPK. This group (designated Xiphophorus linkage group VI) was shown to assort independently from the 14 enzyme loci assigned to linkage groups I-V and from 19 other informative markers within the limits of the data.
在剑尾鱼属的三种鱼类中观察到了可归因于三个蛋白质编码基因座的电泳变异，这三个基因座分别编码谷氨酰胺合成酶（GS）、尿苷单磷酸激酶（UMPK）和转铁蛋白（Tf）。种间F1杂交杂合子的电泳图谱表明UMPK和Tf为单体亚基结构，而GS的亚基数量不确定，为多聚体结构。回交杂种中的连锁分析表明GS - 0% - Tf - 10.8% - UMPK的重组图谱。在数据范围内，该组（指定为剑尾鱼连锁群VI）显示与分配到连锁群I - V的14个酶基因座以及其他19个信息性标记独立分配。
