enzyme proteins that are suggested to be specific to slow-muscle longitudinal sarcoplasmic reticulum are the flavoprotein nadh : cytochrome b ( 5 ) reductase ( mol.wt . 32000 ) , cytochrome b ( 5 ) ( mol.wt . 17000 ) and the stearoyl-coa desaturase , though essentially by criteria of plausibility .
C0033684
proteins
C0016223
flavoprotein