This product should primarily be used as a powder directly in the digestion buffer.
Materials:
Digestion Buffer
0.1 M Ammonium carbonate (NH4)HCO3, pH 8.0.
Procedure:
1. Dissolve approximately 10 mg of the protein (=substrate) in 1 ml of Digestion Buffer.
2. Add sufficient TPCK Trypsin to the protein solution to have an enzyme: substrate ratio between 1:20 and 1:100 (w/w).
3. Incubate sample for 2–18 hours at 37 degrees C.
Note: The exact incubation time and enzyme: substrate ratio will have to be determined for each protein individually.
References:
Walsh, K.A., Neurath, H. (1964). Trypsinogen and chymotrypsinogen as homologous proteins. Proc. Natl. Acad. Sci. USA, 52, p. 884.
Cunningham, L.W. (1954). Molecular-kinetic properties of crystalline diisopropyl phosphoryl trypsin. J. Biol. Chem. 211, p.13.
Kostka, V., Carpenter, F. H. (1964). Inhibition of chymotrypsin activity in crystalline trypsin preparations. J. Biol. Chem. 239, 1799–1803.
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