Abstract
We describe the further purification of an opioid peptide from a porcine pituitary concentrate. The peptide has typical naloxone-reversible opioid activity in the guinea pig ileum myenteric-plexus preparation and mouse vas deferens, and it inhibits stereospecific binding at opiate receptors. It is distinguished from β-endorphin and the enkephalins by its apparent molecular weight, its slow reversal with washing in the guinea pig ileum preparation, and the resistance of its biologic activity to cyanogen bromide treatment. In beef pituitary, slow-reversing, cyanogen bromide resistant activity is found principally in neurointermediate lobe.
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.
