Table 2.

Labeling efficiency of ubiqutin produced using the modified Promega TNT WGCF system with two different concentrations of labeled amino acids in the reaction mixture

Peptide sequence	Position	0.1 mM labeled aa’s (%)	1 mM labeled aa’s (%)
EGIPPDQQR	44–52	68.9	93.7
ESTLHLVLR	74–82	73.4	96.4
IQDKEGIPPDQQR	40–52	66.6	94.0
TITLEVEPSDTIENVK	22–37	77.2	93.2