twenty-three complementation groups of herpes simplex virus type 1 ( hsv-1 ) and 20 of hsv-2 were identified by qualitative and quantitative complementation analysis from among 43 temperature-sensitive ( ts ) mutants of hsv-1 and 29 ts mutants of hsv-2 which had been isolated independently in 10 laboratories .
C0205396
identified
C0205556
qualitative