Anomalous Homology of Flagellar Phases in Salmonellai

I? HASE-1 and phase-2 antigen types of a diphasic salmonella strain are determined by distinct genes, H, and H,, respectively (LEDERBERG and EDWARDS 1953; LEDERBERG and IINO 1956). They are nonallelic and are transduced independently. Therefore, an H-antigen type recombinant obtained by a transduction usually expresses the antigen type of the donor in one phase, but retains that of the recipient in the other. The present paper deals with a genetic analysis of an abnormal recombinant type which expresses phase-l types of both donor and recipient.