文档介绍
CellstructureandorganisationRibosomesarecomposedofRNAandprotein•Ribosomesaremadeof62%RNAand38%proteinthatformtwocomplexesinprokaryotes,the50Sribosomeandthe30Sribosome.•Ribosomeassociatedproteinsarepositivelycharged.ThishelpsthemtobindtothenegativelychargedmRNA.•The30Ssubunitiscomposedof21proteinsandasingle-strandedrRNAmoleculeofabout1,500nucleotides,termedthe16SrRNA.•The50Ssubunitcontains34proteinsandtwoRNAspecies,a5SrRNAof150nucleotidesanda23SrRNAofabout2,900nucleotides.TransferRNAistheferryforaminoacids•TransferRNAhasanLshapeinitsnativethree-dimensionalform.•ThereareuniquetRNAsforeachofthe20commonaminoacids•Aminoacyl-tRNAsynthetasesrecognizetheirrespectivetRNAandaddtheappropriateaminoacid.Inclusionsandotherinternalstructuresarefoundinmanyprokaryoticcells•Prokaryoticcellsdohavesomevisible