a sensitive limiting dilution microculture system was used to obtain minimal estimates of the frequency of cytolytic t lymphocyte precursor cells ( ctl-p ) directed against dba/2 alloantigens , after priming of spleen cells in unidirectional mixed leukocyte cultures ( mlc , c57bl/6 anti-dba/2 ) .
C1536403
cytolytic
C0007634
cells