protein degradation

DUNTEN@XRAY.BMC.UU.SE
Wed, 20 Mar 1996 13:03:16 +0200 (MET)

In the material on protein degradation we read. . .
" Protein degradation is energy dependent, requiring ATP, and . . ."

Then what is the source of energy in the following reaction?

trypsin + your_favorite_protein + H20 --> trypsin + your_favorite_peptides

Or look at it this way. How many of the following statements can be true?
a) Protein synthesis requires ATP.
b) Protein degradation requires ATP.
c) Both a) and b).