alpha-FetoproteinsFetusFetal ProteinsReticulocytesProtein BiosynthesisCell-Free SystemRabbitsEndotoxinsHorseshoe CrabsCell ExtractsMolecular Sequence DataMolecular WeightRNA, MessengerArachnidaElectrophoresis, Polyacrylamide GelPeptide Initiation FactorsAmino Acid SequencePyrogensBase SequenceEscherichia coliKineticsPeptide Chain Initiation, TranslationalCloning, MolecularRecombinant ProteinsDrug ContaminationRibosomesCell LineProteinsPolyribosomes