Stetter D W, Middleton R B
Can J Genet Cytol. 1979 Jun;21(2):255-9. doi: 10.1139/g79-029.
Crosses between an Escherichia coli Hfr trp strain and three Salmonella typhimurium F- trp strains produced some trp+ hybrids in which the tryptophan operon is composed of genes from both parental species.
大肠杆菌高频重组(Hfr)色氨酸菌株与三种鼠伤寒沙门氏菌F-色氨酸菌株杂交产生了一些色氨酸合成酶阳性(trp+)杂种,其中色氨酸操纵子由来自两个亲本物种的基因组成。