【総説：応用糖質科学シンポジウム】<i>Bifidobacterium bifidum</i>由来の硫酸化ムチン糖鎖および血液型抗原分解酵素の構造基盤 [Review] Structural Basis of Glycosyl Hydrolases that Degrade Sulfated Mucin Glycans and Blood Group Antigens from <i>Bifidobacterium bifidum</i>