2-oxobutanoate + L-cysteine = 2-oxo-3-sulfanylpropanoate + (2S)-2-aminobutanoate
2-oxobutanoate + l-cysteine = 2-oxo-3-sulfanylpropanoate + (2s)-2-aminobutanoate
2-oxobutanoate + L-cysteine = 2-oxo-3-sulfanylpropanoate + (2S)-2-aminobutanoate
2-oxobutanoate + l-cysteine = 2-oxo-3-sulfanylpropanoate + (2s)-2-aminobutanoate