since the nascent peptides of nadph-cytochrome c reductase and cytochrome b5 are released from bound ribosomes to the cytoplasmic surface of endoplasmic reticulum , while those of secretory proteins are discharged into the lumen across the membrane , the strength of the association between ribosomes and microsomal membrane seems to be correlated with the direction of release of nascent peptides .
C0010834
cytoplasmic
C0014239
endoplasmic reticulum