TRYPTOPHAN-REQUIRING PARENTAL STRAINS YIELDSALMONELLA TYPHIMURIUM×ESCHERICHIA COLIHYBRID RECOMBINANTS WITH FUNCTIONAL TRYPTOPHAN OPERONS

1979 ◽  
Vol 21 (2) ◽  
pp. 255-259
Author(s):  
Dennis W. Stetter ◽  
Richard B. Middleton

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.

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