N(6)-[(R)-lipoyl]-L-lysyl-[protein] + 3-methyl-2-oxobutanoate + H(+) = N(6)-[(R)-S(8)-2-methylpropanoyldihydrolipoyl]-L-lysyl-[protein] + CO2
n(6)-[(r)-lipoyl]-l-lysyl-[protein] + 3-methyl-2-oxobutanoate + h(+) = n(6)-[(r)-s(8)-2-methylpropanoyldihydrolipoyl]-l-lysyl-[protein] + co2
N(6)-[(R)-lipoyl]-L-lysyl-[protein] + 3-methyl-2-oxobutanoate + H(+) = N(6)-[(R)-S(8)-2-methylpropanoyldihydrolipoyl]-L-lysyl-[protein] + CO2
n(6)-[(r)-lipoyl]-l-lysyl-[protein] + 3-methyl-2-oxobutanoate + h(+) = n(6)-[(r)-s(8)-2-methylpropanoyldihydrolipoyl]-l-lysyl-[protein] + co2