<Tr> <Td_colspan="4"> <Table> <Tr> <Th_colspan="4"> hide RNA expression pattern </Th> </Tr> <Tr> <Td_colspan="4"> </Td> </Tr> <Tr> <Td_colspan="4"> More reference expression data </Td> </Tr> </Table> </Td> </Tr> <Table> <Tr> <Th_colspan="4"> hide RNA expression pattern </Th> </Tr> <Tr> <Td_colspan="4"> </Td> </Tr> <Tr> <Td_colspan="4"> More reference expression data </Td> </Tr> </Table> <Tr> <Th_colspan="4"> hide RNA expression pattern </Th> </Tr> <Tr> <Td_colspan="4"> More reference expression data </Td> </Tr>

What enzyme breaks down acetylcholine into acetic acid