Histochemical, enzymatic, and contractile properties of skeletal muscle fibers in the lizard Dipsosaurus dorsalis Journal Article uri icon



  • AbstractLizard skeletal muscle fiber types were investigated inthe iliofibularis (IF) muscle of the desert iguana (Dipsosaurus dorsalis). Three fiber types were identified based on histochemical staining for myosin ATPase (mATPase), succinic dehydrogenase (SDH), and αglycerophosphate dehydrogenase (αGPDH) activity. The pale region of the IF contains exclusively fast‐twitch‐glycolytic (FG) fibers, which stain dark for mATPase and αGPDH, light for SDH. The red region of the IF contains fast‐twitch‐oxidative‐glycolytic (FOG) fibers, which stain dark for all three enzymes, and tonic fibers, which stain light for mATPase, dark for SDH, and moderate for αGPDH confirm these histochemical interpretations. Lizard FG and FOG fibers possess twitch contraction times and resistance to fatigue comparable to analogous fibers in mammals, but are one‐half as oxidative and several times as glycolytic as analogous fibers in rats. Lizard tonic fibers demonstrate the acetylcholine sensitivity common to other vertebrate tonic fibers.

publication date

  • December 1, 1980

has restriction

  • closed

Date in CU Experts

  • January 2, 2015 7:07 AM

Full Author List

  • Gleeson TT; Putnam RW; Bennett AF

author count

  • 3

Other Profiles

International Standard Serial Number (ISSN)

  • 0022-104X

Electronic International Standard Serial Number (EISSN)

  • 1097-010X

Additional Document Info

start page

  • 293

end page

  • 302


  • 214


  • 3