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Determining how much enzyme to use based on activity units


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#1 NYYFan

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Posted 10 March 2010 - 08:45 AM

Hello all, I have a question regarding the amount of a specific enzyme I need to use based on it's activity units. I have the feeling I'm making this more complicated then it is, so I want to doublecheck if I'm doing this right. So I have a particular enzyme which is 1.5 U/mg (1 U = amount of enzyme which liberates 1 umol substrate per minute under specific condtions), I am using 1 mg of substrate and am trying to figure out the correct amount of enzyme to use and keep coming up with different amounts. Would anyone care to help me out with this? Thank you.

Edited by NYYFan, 10 March 2010 - 08:45 AM.


#2 mdfenko

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Posted 10 March 2010 - 01:08 PM

how many umoles are in 1mg substrate?

you don't give much information.

(by the way, i'm also a nyy fan)
talent does what it can
genius does what it must
i do what i get paid to do

#3 NYYFan

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Posted 10 March 2010 - 02:49 PM

The MW of the substrate is 932, so 1 mg would be roughly 1.1 umol.

BTW, we win #28 this year!

#4 mdfenko

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Posted 12 March 2010 - 08:11 AM

so you need to use ~0.72mg of your enzyme (1.5u/mg*.72=1.08u; 1mg/.932=1.073umol).
talent does what it can
genius does what it must
i do what i get paid to do




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