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Adenosine 5'-monophosphate (AMP)

Adenosine 5'-monophosphate (AMP) is used in the determination of creatine kinase and 5'-nucleotidase.



1.Source: Disodium salt
   Form: Crystalline powder 
   Molecular Weight: 391.19 
   Solubility: Distilled water or dilute buffer 
   Stability: Store at -20 C (-4 F) 
   Catalog No.: 208J0000 
$15.00/g


1. Triethanolamine buffer, 0.1M, pH 7.6: 1.86 g TEA• HCl in 80 ml distilled water. Adjust to pH 7.6 with 1.0 M NaOH, adjust volume to 100 ml with distilled water.
2. 14mM NADH:10 mg NADH-Na2 with 1 ml distilled water.
3. 16.5 mM ATP: 10 mg NADH-Na2 in 1 ml distilled water.
4. 0.5 M MgSO4/2 M KCl: 1.23 g MgSO4• 7 H2O and 1.49 g KCl in 10 ml distilled water.
5. 32 mM Phosphoenolpyruvate: 15 mg PEP-(CHA)3 in 1 ml MgSO4/KCl.
6. LDH, from rabbit muscle: 5 mg protein/ml (550 U/mg).
7. Pyruvate kinase, from rabbit muscle: 10 mg protein/ml (200 U/mg).
8. Myokinase, from rabbit muscle: 5 mg protein/ml (360 U/mg).



1. Dissolve 50 mg AMP in 50 ml distilled water in a volumetric flask.
2. Set spectrophotometer (equipped with strip chart recorder and temperature control) at 340 nm and 25° C.
3. Into two cuvettes, pipette the following:
BLANK SAMPLE
Buffer (1) 3.00 ml 3.00 ml
NADH (2) 0.05 ml 0.05 ml
ATP (3) 0.01 ml 0.01 ml
PEP (5) 0.15 ml 0.15 ml
LDH (6) 0.01 ml 0.10 ml
PK (7) 0.02 ml 0.02 ml
Distilled H2O0.05 ml - - -
Sample - - - 0.05 ml
Mix and read the absorbance A1.
4. Start the reaction by adding 0.01 ml myokinase (8) to both the blank and sample. Read the absorbance A2.



A = (A1 - A2 )sample - (A1 - A2 )blank


Total Vol. = 3.04 ml
449.2 = MW of Adenosine 5'-diphosphate
Sample Vol. = 0.10 ml

 

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