Signal recognition particle(SRP) pathway is a highly conserved pathway for protein targeting, and was found sequentially in eukaryotes, prokaryotes and archaebacteria.

• 信号识别颗粒(signal recognition particle,SRP)途径是一个高度保守的蛋白靶向途径,先后在真核生物、原核生物和古细菌中被发现。