<Tr> <Td> CAC </Td> <Td> CAT </Td> <Td> CAC </Td> </Tr> <Tr> <Td> CTG </Td> <Td> CTC </Td> <Td> CTC </Td> </Tr> <Tr> <Td> GTG </Td> <Td> ATG </Td> <Td> GTG </Td> </Tr>

A mutation that does not alter the amino acid sequence