When cursor points to a box further details will be displayed in a tooltip window. If you click on the box you will change to appropriate reaction scheme or enzyme specification.
© IUBMB 2007
xanthosine 5'-phosphate biosynthesis
EC 188.8.131.52 7-methylxanthosine synthase
EC 184.108.40.206 theobromine synthase
EC 220.127.116.11 caffeine synthase
EC 18.104.22.168 5'-nucleotidase
EC 22.214.171.124 N-methyl nucleosidase