A.Asn,Ser 或ThrB.Asp或GluC.Gln或ArgD.Gly,Ala或Asp
A.糖脂B.糖胺聚糖(粘多糖)C.凝集素D.脂多糖
A.纖維素B.幾丁質(zhì)C.糖原D.透明質(zhì)酸