Standardized descriptors of function can be given at the biochemical level (as in the Enzyme Commission (E.C.) classification), the process or pathway level (as in the KEGG and BioCyc databases ...

The diagram below shows what happens to an enzyme ... pH of 9 and a working range of between pH 7-11. Most other enzymes function within a working pH range of about pH 5-9 with neutral pH 7 ...