<Tr> <Th> Type </Th> <Th> Abbr . </Th> <Th> Function </Th> <Th> Distribution </Th> <Th> Ref . </Th> </Tr> <Tr> <Td> Frameshift element </Td> <Td> </Td> <Td> Regulates alternative frame use with messenger RNAs </Td> <Td> Archaea, bacteria, Eukaryota, RNA viruses </Td> <Td> </Td> </Tr> <Tr> <Td> Internal ribosome entry site </Td> <Td> IRES </Td> <Td> Initiates translation in the middle of a messenger RNA </Td> <Td> RNA virus, Eukaryota </Td> <Td> </Td> </Tr> <Tr> <Td> Iron response element </Td> <Td> IRE </Td> <Td> Regulates the expression of iron associated genes </Td> <Td> Eukaryota </Td> <Td> </Td> </Tr>

Identify the cis regulatory components you would expect to find in an operon