The molecule is a single-stranded DNA oligonucleotide containing four consecutive thymidyl residues, T1, T2, T3 and T4, arranged in the direction from the 5'-terminus to the 3'-terminus, with a (6-4) lesion at the central T2 and T3 residues. It has a role as an epitope.
[(2R,4S,5R,10S,11R,13R,18R,19S)-8,18-dihydroxy-4-[hydroxy-[[(2R,3S,5R)-3-hydroxy-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxy]phosphoryl]oxy-18,24-dimethyl-8,15,17,22-tetraoxo-7,9,12,26-tetraoxa-1,14,16,21-tetraza-8lambda5-phosphapentacyclo[18.2.2.12,5.110,13.014,19]hexacosa-20,23-dien-11-yl]methyl [(2R,3S,5R)-5-(5-methyl-2,4-dioxopyrimidin-1-yl)-2-(phosphonooxymethyl)oxolan-3-yl] hydrogen phosphate