CC-112 sr1 mt+Locus: SR1, linkage group IX
Source: From R.P. Levine, designated sr-1-H-5; this stock is a derivative of the mutant strain originally isolated by N.W. Gillham and designated sr-1a.
Comment: This is an excellent marker for linkage group IX, easy to score as resisatnt to 100 micrograms/ml streptomycin.