Final answer:
The region of SRP that binds the signal peptide involves GDP in a process called translocation. The SRP recognizes the hydrophobic signal peptide and helps to direct the ribosome-SRP complex to the RER membrane. Translation resumes and the protein enters the RER for further processing and folding.
Step-by-step explanation:
The region of SRP (signal recognition particle) that binds the signal peptide involves GDP in a process called translocation.
The SRP, consisting of protein and RNA, recognizes the hydrophobic signal peptide at the N-terminus of a protein being synthesized by a ribosome.
It then binds to the signal peptide, which helps to direct the ribosome-SRP complex to the RER (rough endoplasmic reticulum) membrane, where translation resumes and the protein enters the RER for further processing and folding.