Insights into the mechanism of ADP action on flagellar motility derived from studies on bull sperm.

Adenosine diphosphate (ADP) is known to have interesting effects on flagellar motility. Permeabilized and reactivated bull sperm exhibit a marked reduction in beating frequency and a greatly increased beat amplitude in the presence of 1-4 mM ADP. In this study we examined the force production of sperm reactivated with 0.

Alterations in lens permeability during galactose cataract development in rat.

Lens permeability has been shown to be compromised during galactose-induced cataract development in rats. Recent studies have demonstrated permeability and diffusion pathways as well as endocytotic activity in normal lenses of different species using tracers of different molecular weights. We investigated the permeability and diffusion of tracers in normal rat lenses and in lenses during cataract development using three different molecular weight tracers, lanthanum nitrate (LN, MW 430), ruthenium red (RR, MW 858.