RES
1r:r1
REP
REP1:2o(-1+2)2d=-1--1
RES
2b:x-dgro-dgal-NON-2:6|1:a|2:keto|3:d
3s:n-glycolyl
LIN
1:2d(5+1)3n

• Inoue S et al. Isolation of a novel glycoprotein from the eggs of rainbow trout: occurrence of disialosyl groups on all carbohydrate chains. Biochem Biophys Res Commun. 1978 Aug 14;83:(3):1018-23. doi: 10.1016/0006-291x(78)91497-3. PMID: 708420.

• Sato C et al. Frequent occurrence of pre-existing alpha 2-->8-linked disialic and oligosialic acids with chain lengths up to 7 Sia residues in mammalian brain glycoproteins. Prevalence revealed by highly sensitive chemical methods and anti-di-, oligo-, and poly-Sia antibodies specific for defined chain lengths. J Biol Chem. 2000 May 19;275:(20):15422-31. doi: 10.1074/jbc.275.20.15422. PMID: 10809778.

• Sato C et al. Identification of oligo-N-glycolylneuraminic acid residues in mammal-derived glycoproteins by a newly developed immunochemical reagent and biochemical methods. J Biol Chem. 1998 Jan 30;273:(5):2575-82. doi: 10.1074/jbc.273.5.2575. PMID: 9446559.