eL42 protein from human or Schizosaccharomyces pombe, Eukaryal 80S ribosomes, Lys-55 of S. pombe eL42, Mechanism of peptidyl transfer and peptidyl-tRNA hydrolysis by eukaryotic 80S ribosomes, the GGQ motif of eL42, The peptidyl transferase center of 80S ribosomes from eukaryotes, Schizosaccharomyces/chemistry, Mutation, Missense, Peptide Chain Elongation, Translational/physiology, Schizosaccharomyces pombe Proteins/chemistry, Ribosomes/chemistry, Ribosomal Proteins/chemistry, Catalysis, Amino Acid Substitution, CYCLOHEXIMIDE RESISTANCE, GGQ MOTIF, ESCHERICHIA-COLI, PEPTIDE-BOND FORMATION, TRANSFER RNA-SYNTHETASE, RELEASE FACTOR ERF1, TRANSFERASE CENTER, MESSENGER-RNA, STRUCTURAL BASIS, BINDING-SITE