Cytochrome b558/566 from the archaeon Sulfolobus acidocaldarius has a unique Asn-linked highly branched hexasaccharide chain containing 6-sulfoquinovose. (2000)

Zahringer U, Moll H, Hettmann T, Knirel Y, Schfer G
Eur J Biochem, 2000 vol.267:4144-4149