5-methyl-UTP(out) + UTP(in) <=> 5-methyl-UTP(in) + UTP(out)
5-methyl-utp(out) + utp(in) <=> 5-methyl-utp(in) + utp(out)
5-methyl-UTP(out) + UTP(in) <=> 5-methyl-UTP(in) + UTP(out)
5-methyl-utp(out) + utp(in) <=> 5-methyl-utp(in) + utp(out)