Human hypothalamus and intestine contain a hydra-neuropeptide.
From human hypothalamus and intestine a substance was isolated which has the same physico-chemical and biological properties as the head activator from hydra. The hypothalamus of an adult man contained activity corresponding to at least 10(8) hydra. An intestine of a 3-month-old human embryo contained approx. 10(5) hydra equivalents and that of a 6-month-old embryo 10(6). A gradual increase in content of head activator during development was also found in rat intestine.
D000818:Animals; D004622:Embryo, Mammalian; D004625:Embryo, Nonmammalian; D005260:Female; D005333:Fetus; D006801:Humans; D006829:Hydra / Q000032:analysis; D007031:Hypothalamus / Q000032:analysis*; D007422:Intestines / Q000032:analysis* / Q000196:embryology; D008297:Male; D008875:Middle Aged; D009419:Nerve Tissue Proteins / Q000302:isolation & purification*; D011247:Pregnancy
D009419:Nerve Tissue Proteins