. "Catalysis of the reaction: peptidyl-tRNA(1) + aminoacyl-tRNA(2) = tRNA(1) + peptidylaminoacyl-tRNA(2)." . . "peptidyltransferase activity" . "peptidyl-tRNA:aminoacyl-tRNA N-peptidyltransferase activity" . . . . . . . . . . . . . .