label: N(6)-(2-hydroxyisobutanoyl)-L-lysyl-[protein] + H2O <=> 2-hydroxy-2-methylpropanoate + L-lysyl-[protein]
label_lc: n(6)-(2-hydroxyisobutanoyl)-l-lysyl-[protein] + h2o <=> 2-hydroxy-2-methylpropanoate + l-lysyl-[protein]