GCA_000013225.1 CYB_1794 definition carbon dioxide concentrating mechanism protein CcmM GCA_000013225.1 CYB_1795 definition carbon dioxide concentrating mechanism protein CcmL GCA_000013225.1 CYB_1796 definition carbon dioxide concentrating mechanism protein CcmK GCA_000013225.1 CYB_1797 definition carbon dioxide concentrating mechanism protein CcmK