<Table> <Tr> <Td> </Td> <Td> This article's lead section may not adequately summarize its contents . To comply with Wikipedia's lead section guidelines, please consider modifying the lead to provide an accessible overview of the article's key points in such a way that it can stand on its own as a concise version of the article . (discuss). (June 2016) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article's lead section may not adequately summarize its contents . To comply with Wikipedia's lead section guidelines, please consider modifying the lead to provide an accessible overview of the article's key points in such a way that it can stand on its own as a concise version of the article . (discuss). (June 2016) </Td> </Tr>

The cell wall of both bacteria and cyanobacteria contains