Thick filaments in guinea pig vas deferens smooth muscle.
D000818:Animals; D006168:Guinea Pigs; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D009130:Muscle, Smooth / Q000033:anatomy & histology / Q000166:cytology*; D014649:Vas Deferens / Q000033:anatomy & histology / Q000166:cytology