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and is recognized by the signal-recognition particle (SRP). SRP then halts further translation (translational arrest only occurs in Eukaryotes) and directs the signal sequence-ribosome-mRNA complex to the SRP receptor, which is present on the surface of either the plasma membrane (in prokaryotes) or the ER (in eukaryotes). Once membrane-targeting is completed, the signal sequence is inserted into the translocon. Ribosomes are then physically docked onto

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