Abstract
Binding studies utilizing the techniques of gel filtration, rate dialysis and equilibrium dialysis yielded a value of 2.0 binding sites per molecule for either substrate or inhibitors like 6‐phospho‐gluconate and pyridoxal 5′‐phosphate to rabbit muscle phosphoglucose isomerase, thereby establishing that the enzyme has one catalytic site per subunit. For the substrates and 6‐phospho‐gluconate studies were performed at various pH values. For 6‐phosphogluconate, the dissociation constant was found to change dramatically with increasing pH, following a pattern analogous to that deduced from catalytic rate measurements. For the catalytic equilibrium mixture of glucose 6‐phosphate and fructose 6‐phosphate, the Kd showed excellent agreement with the Km values reported earlier. The binding studies are discussed in relation to the current concept of the catalytic mechanism.
Published Version (Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
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.