Protein targeting

short peptide (usually 16-30 amino acids long) present at the N-terminus of the majority of newly synthesized proteins that are destined towards the secretory pathway

the process of targeting specific proteins to particular regions of the cell, typically membrane-bounded subcellular organelles, usually requiring an organelle-specific protein sequence motif

The translocon (also called a translocator or translocation channel) is a general term for a protein channel in biological membranes that functions to move polypeptides across the membrane or insert them into the lipid bilayer. This structure is a key component of the protein translocation pathway in all organisms, from bacteria, archaea, and eukaryotes.

Protein of the immune system