the specific activity of adenylate cyclase ( atp pyrophosphate-lyase [ cycling ] e.c.4.6.1.1 ) was elevated in t cells from the aged and ds groups , whereas that of guanylate cyclase ( gtp pyrophosphate-lyase [ cycling ] e.c.4.6.1.2 ) decreased with age and in ds .
C1382029
atp
C0024188
lyase