And at this point, the synthesis of the growing polypeptide chain commences. So it basically resumes and the growing polypeptide chain will extend into the endoplasmic reticular lumen of that organelle. So basically, in step number one, our free ribosome synthesizes the signal sequence that is found at the beginning of the growing polypeptide chain. And what the signal sequence means is the polypeptide that is produced will ultimately either be secreted by that cell or will be placed, will be embedded into the plasma membrane. Once the signal sequence is synthesized, the signal recognition particle SRP binds onto the signal sequence, forming the SRP ribosome complex. And then this entire complex goes on and binds onto the SRP receptor, where a series of processes basically opens up this protein channel known as translocan.