the beta-lactams such as ampicillin , ps-5 , methicillin and sce-963 , which had high affinities for pbp-2 showed strong antibacterial activities and the beta-lactams such as cephamycin c , y-g19z-gg and y-g19z-g , which had high affinities for pbp-1 but low affinities for pbp-2 , showed weak antibacterial activities .
C0002680
ampicillin
C0279516
antibacterial