SUMMARY: Genes determining the flagellar antigens were introduced from into by sexual recombination. The gene for the phase-1 flagellar antigen of Salmonella was found to be allelic to , the gene for the only flagellar antigen of The phase-2 antigen of Salmonella has no counterpart in ; if the corresponding salmonella gene is introduced in , diphasic strains are produced whose phase-2 antigen is that of the Salmonella parent; the phase-1 antigen can be that of either parent. In each case the diphasic strains undergo a true phase variation, with either the phase-1 or the phase-2 antigen being expressed at one time. The rates of this variation are comparable to those in the Salmonella parent.


Article metrics loading...

Loading full text...

Full text loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error