Re: [ccp4bb] Enzyme Vmax and Km

2021-06-21 Thread Prem Prakash
Dear Tristan and all my ccp4bb members, Thank you so much for your valuable suggestions into the enzyme kinetics issue I have been facing. It gave me new insights to design my experiment and I started working on those inputs. Thank you all once again. It's very helpful. With kind regards Prem O

Re: [ccp4bb] Enzyme Vmax and Km

2021-06-18 Thread Artem Evdokimov
Is your enzyme monomeric or multimeric? What time exactly does it mean when you say unprocessed substrate versus processed? What are your error margins (no error bars evident on your plots)? Depending on your errors, your second plot is not a 'steep decline' but instead could be a constant line.

Re: [ccp4bb] Enzyme Vmax and Km

2021-06-18 Thread Jon Cooper
Hello, you could also try: http://www.ic50.tk/kmvmax.html Or http://ic50.org/kmvmax.html The former has an exponential decay thing that might help with your substrate inhibition and other things if you have biphasic behaviour ;-0 Cheers, Jon.C. Sent from ProtonMail mobile Original

Re: [ccp4bb] Enzyme Vmax and Km

2021-06-18 Thread Roger Rowlett
t; Hope this helps, > > > > Nic > > > > *From:* CCP4 bulletin board *On Behalf Of *Tristan > Croll > *Sent:* 18 June 2021 08:19 > *To:* CCP4BB@JISCMAIL.AC.UK > *Subject:* Re: [ccp4bb] Enzyme Vmax and Km > > > > Hi Prem, > > > > The immediat

Re: [ccp4bb] Enzyme Vmax and Km

2021-06-18 Thread Harmer, Nicholas
CP4BB@JISCMAIL.AC.UK Subject: Re: [ccp4bb] Enzyme Vmax and Km Hi Prem, The immediate problem here is that the curve for the processed substrate simply cannot be described by simple Michaelis-Menten kinetics. Assuming the assay has worked as expected, the declining rate with increasing substrate concentr

Re: [ccp4bb] Enzyme Vmax and Km

2021-06-18 Thread Tristan Croll
Hi Prem, The immediate problem here is that the curve for the processed substrate simply cannot be described by simple Michaelis-Menten kinetics. Assuming the assay has worked as expected, the declining rate with increasing substrate concentration suggests to me that this substrate also acts as