MaleMusFIG 27: Spicule protractor muscle attachment sites.

A. Epifluorescent image from transgenic animals expressing the hlh-8 ::GFP reporter gene (transcription factor), sub-dorsal view. (Strain source: B.D. Harfe, M. Krause and A. Fire.)
B. Epifluorescent image from transgenic animals expressing the unc-27::GFP reporter gene (Troponinl, thin filaments), left, lateral oblique view. (Strain source: L. Jia and S.W. Emmons.)