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)