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# calculate the mole of substrate in assay...

## calculate the mole of substrate in assay... - Biochemistry Forum

### calculate the mole of substrate in assay... - Discuss and post questions regarding the study of Biochemistry. If you need homework help this is the place to ask!

#1
06-18-2010, 03:24 PM
Pipette Filler

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calculate the mole of substrate in assay...

"alkaline phosphate is assayed at concentration 1ug/ml at r.t. in 0.1M glycine buffer, pH9.5 in presence of 5mM MgCl2 as a factor in reaction. The substrate 4-nitrophenol (4-NPP) is added in concentration range 0.05 mM to 3.0mM. The appearance of the product, 4-nitrophenol (4-NP) can be moitored at 420nM (E=15mM-1cm-1)

Vmax has been estimated to be 0.1umol/min/assay
Km is 0.15mM under conditons described in the legend.
The MW of enzyme is 100000

If i want to calucalate
1) If the assay was performed at a substrate concentration 3mM how many nmole of substrate would 1ug of alkaline phosphate converted to product in 1min?

2) If the assay was performed at a substrate concentration 3mM how many mmole of product would 1mmole of enzyme release in 1min?

these 2 questions i am stuggling...
answer 1) is 33.3 and 2) 3333
#2
06-26-2010, 04:58 AM
Banned

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Re: calculate the mole of substrate in assay...

thumps up for your article, great post...

 Tags assay , calculate , mole , substrate

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