although the resolution of the immunogold-labeling technique used ( 60 nm ) does not permit one to determine whether the specific labeling within 30 nm of the cytoplasmic side of the sarcolemma is associated with the sarcolemma and/or the junctional sarcoplasmic reticulum , it is likely that the low amount of labeling in this region represents phospholamban associated with sarcoplasmic reticulum .
C0010834
cytoplasmic
C0036226
sarcoplasmic reticulum