Table 1.

Time-dependent inhibition of eqGGT activity by 5-thiohistidines ± DTT. The % of residual GGT activity after the incubation with 5 mM of DTT, 20 µM of ovo, 20 µM of 5-thio, ovo/ 5-thio ± DTT at the same concentrations, or in absence of the compounds at 0, 30 and 60 min, is reported.

Time (min)	eqGGT	DTT	ovo	5-thio	DTT + ovo	DTT + 5-thio
0	100%	93%	39%	33%	94%	86%
30	100%	89%	60%	47%	83%	71%
60	100%	72%	72%	59%	73%	60%