Abstract
1. 1. A study of hexokinases and sugar dehydrogenases of Limulus polyphemus has shown that the predominant hexokinase of the hepatopancreas, a fructomannokinase, has little ability to catalyze the phosphorylation of glucose. The hepatopancreas also has smaller quantities of two typical hexokinases each with a very low K m for glucose and mannose and a high K m for fructose. 2. 2. In contrast the chief, very active hexokinase of Limulus muscle has great affinity for glucose and mannose and little for fructose. Muscle also has small quantities of the fructomannokinase and a second low K m hexokinase. 3. 3. A d-xylose-NADP dehydrogcnase capable also of using glucose, galactose and other sugars to a lesser extent, is much more active in hepatopancreas than in muscle. 4. 4. A NAD(P)-dchydrogenase, using l-fucose, d-arabinose and l-galactose and not active with any other sugar tested occurs chiefly in the hepatopancreas. 5. 5. The results are in accord with earlier conclusions about the relative importance of muscle in glucose metabolism in Limulus.
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 B: Biochemistry and Molecular Biology
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.
