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. And then once our translocan channel opens up, our growing polypeptide chain extends into the er lumen, as shown, and then synthesis of that polypeptide chain basically resumes and continues. And it will continue. And as it continues, our growing polypeptide chain will extend into the er lumen.