L-histidyl-glycine(out) <=> L-histidyl-glycine(in)
l-histidyl-glycine(out) <=> l-histidyl-glycine(in)
L-histidyl-glycine(out) <=> L-histidyl-glycine(in)
l-histidyl-glycine(out) <=> l-histidyl-glycine(in)