The structure of srp Alu RNA domain s rna domain SRP9/14 SRP68/72 SRP54 53 SRP19 Elongation arrest Receptor binding Signal recogntion The 7S RNA of the srP particle is divided into two parts. The 100 bases at the 5 end and 45 bases at the 3 end are closely related to the sequence ofalu RNA. a common mammalian smalI RNA. They therefore define the aLl domain. The remaining part of the RNA comprises the S domain. Five of the six proteins bind directly to the 7S RNA. each function of the srp is associated with a particular protein(s)The structure of SRP The 7S RNA of the SRP particle is divided into two parts. The 100 bases at the 5 end and 45 bases at the 3 end are closely related to the sequence of ALU RNA, a common mammalian small RNA. They therefore define the ALU domain. The remaining part of the RNA comprises the S domain. Five of the six proteins bind directly to the 7S RNA. Each function of the SRP is associated with a particular protein(s)