The extent of rII deletions in phage T4

Abstract

The extent of certain rII deletions in phage T4 has been mapped by genetic means beyond the terminus of the B cistron. They extend to varying degrees, nearly to the ac^s locus. The phenotypes of these mutants indicate that there are two or three cistrons between rII B and ac^s, and that the functions coded for by these cistrons are not essential for growth in any known E. coli K12 strain or E. coli lysogen.