Abstract
1. 1. Tyrosine concentrations in L. maderae and P. americana followed a cyclical pattern, remaining low during the interecdysial period, increasing rapidly in the pharate insect with a peak near ecdysis, and declining as tanning of the new cuticle proceeds. 2. 2. Tyrosine levels in integument, haemolymph and fat body reflected the cyclical patterns of the whole insect. 3. 3. Total free tyrosine released for tanning was proportional to body weight so that whole body concentrations were nearly equal in both species at ecdysis. L. maderae maintained higher post-ecdysial levels than P. americana. 4. 4. Phenylalanine concentrations remained very low in both species with only slight increases at ecdysis. 5. 5. Tyrosine and/or phenylalanine are apparently sequestered in a storage form during the larval feeding period.
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 callMore From: Comparative Biochemistry and Physiology -- Part A: Physiology
Disclaimer: 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.
