an L-amino acid tripeptide(out) + H(+)(out) => an L-amino acid tripeptide(in) + H(+)(in)
an l-amino acid tripeptide(out) + h(+)(out) => an l-amino acid tripeptide(in) + h(+)(in)
an L-amino acid tripeptide(out) + H(+)(out) => an L-amino acid tripeptide(in) + H(+)(in)
an l-amino acid tripeptide(out) + h(+)(out) => an l-amino acid tripeptide(in) + h(+)(in)