The Transfer of Motility and Tyrosine Requirement to Escherichia coli Strain B by Recombination with E. coli Strain K12

Motile recombinants may be obtained by crossing Escherichia coli strain K12, F+, with the non-flagellated strain E. coli strain B, F-. The flagella of the recombinants have the same antigenic pattern as those of the F+ parent and the locus controlling motility is linked to loci controlling tyrosine requirement and fermentation of arabinose and galactose (gal 5).