Hydrins

Hydrins 1 and 2 have been isolated from the pituitary glands of Xenopus laevis and Rana esculenta, respectively. Both peptides are devoid of oxytocic and pressor activities in contrast to vasotocin, whereas they are active on the frog bladder (hydroosmotic activity) and on the frog skin (water-balance activity). It is assumed that the hydrins could be involved in the water-electrolyte regulation of amphibians.

Family Literatur:
Y.Rouillé et al., Proc. Natl. Acad. Sci. USA, 86, 5272 (1989)