Not sure if this is a capitilisation error or not but
in the intenz curator tool it is entered as HT-B coming
from SIB but enzyme.dat now has it as "Ht-b"?
AN line 3 is different for entry: 188.8.131.52 (EC of
ENZYME.DAT: AN Ht-b.
INTENZ.DAT: AN HT-B.