an alpha-amino acid + an alcohol + H(+) => an alpha-amino acid ester + H2O
an alpha-amino acid + an alcohol + h(+) => an alpha-amino acid ester + h2o
an alpha-amino acid + an alcohol + H(+) => an alpha-amino acid ester + H2O
an alpha-amino acid + an alcohol + h(+) => an alpha-amino acid ester + h2o