by means of saturation transfer electron spin resonance spectroscopy the rotational motion of spin-labeled ca2+-dependent atpase molecules has been investigated for three kinds of preparations of rabbit skeletal muscle sarcoplasmic reticulum : maclennan 's enzyme ( purified atpase preparation ) , dopc- and egg pc-atpase ( purified atpase preparations in which endogenous lipids are replaced with dioleoyl and egg yolk phosphatidylcholine , respectively ) .
C0001476
ca2
C0001473
atpase