RES
1r:r1
REP
REP1:5o(3+1)2d=-1--1
RES
2b:b-dglc-HEX-1:5
3s:n-acetyl
4b:a-dgal-HEX-1:5
5b:b-dglc-HEX-1:5
6s:n-acetyl
7b:b-lman-HEX-1:5|6:d
8s:n-acetyl
9b:a-dglc-HEX-1:5
LIN
1:2d(2+1)3n
2:2o(3+1)4d
3:4o(3+1)5d
4:5d(2+1)6n
5:5o(4+1)7d
6:7d(2+1)8n
7:4o(4+1)9d

• Stenutz R et al. The structures of Escherichia coli O-polysaccharide antigens. FEMS Microbiol Rev. 2006 May;30:(3):382-403. doi: 10.1111/j.1574-6976.2006.00016.x. PMID: 16594963.

• Ren Y et al. Characterization of Escherichia coli O3 and O21 O antigen gene clusters and development of serogroup-specific PCR assays. J Microbiol Methods. 2008 Oct;75:(2):329-34. doi: 10.1016/j.mimet.2008.07.010. PMID: 18700154.