Abstract
By use of the indirect immunofluorescence method in conjunction with an elution-restaining technique, cells in the caudal neurosecretory system of the big skate ( Raja binoculata) and the plainfin midshipman ( Porichthys notatus) were shown to contain both urotensin I (UI)/corticotropin-releasing factor (CRF) and urotensin II (UII) immunoreactivities. In the skate coexistence was complete, while in the midshipman some cells demonstrated immunoreactivity for only one or the other neuropeptide. The present results do not support previous suggestions that, like vasopressin and oxytocin in the hypothalamic magnocellular system, UI and UII exist in separate cellular populations in the caudal neurosecretory system. Results of these and other experiments indicate that there exists a wide range of species variation in the degree of coexistence of UI/CRF and UII immunoreactivities within caudal neurosecretory cells.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
