sulfite + L-alanine + H(+) => 3-sulfino-L-alanine + H2O
sulfite + l-alanine + h(+) => 3-sulfino-l-alanine + h2o
sulfite + L-alanine + H(+) => 3-sulfino-L-alanine + H2O
sulfite + l-alanine + h(+) => 3-sulfino-l-alanine + h2o