title: Mechanochemical coupling in flagella. V. Effects of viscosity on movement and ATP-dephosphorylation of Triton-demembranated sea-urchin spermatozoa.
abstract: Improved techniques have been used to measure movement-coupled ATP-dephosphorylation by suspensions of motile, reactivated sea-urchin spermatozoa. The results confirm that the movement-coupled ATP-dephosphorylation is proportional to beat frequency under conditions where the bend angle remains constant. Some observations suggest that the rate of ATP-dephosphorylation is also related to the amplitude of sliding between flagellar tubules, but our attempts to measure this relationship have been unsuccessful.
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism*; D000818:Animals; D002465:Cell Movement; D005407:Flagella / Q000502:physiology*; D008297:Male; D010710:Phosphates / Q000378:metabolism; D011092:Polyethylene Glycols / Q000494:pharmacology; D012617:Sea Urchins / Q000378:metabolism; D013094:Spermatozoa / Q000378:metabolism / Q000502:physiology*; D014783:Viscosity
chemical_list: D010710:Phosphates; D011092:Polyethylene Glycols; D000255:Adenosine Triphosphate