Occurrence of β-d-galactopyranosyl units esterified at O-6 with 2-aminoethylphosphonic acid in the d-galactan of albumen glands of the snail Megalobulimus paranaguensis
作者:José D. Fontana、José H. Duarte、Ciro B.H. Gallo、Marcello Iacomini、Philip A.J. Gorin
DOI:10.1016/s0008-6215(00)90706-7
日期:1985.11
residues with smaller proportions of 3- O - and 6- O -substituted units. 13 C-n.m.r. spectroscopy has now shown that 2-aminoethylphosphonic acid ( 1 ) is an additional component and its presence was confirmed by cellulose-plate chromatography. Furthermore, the 2-aminoethylphosphonic acid-substituted oligosaccharides, formed on partial hydrolysis of the polysaccharide, were isolated, examined by fast-atom-bombardment
摘要以前已发现蜗牛大叶螺的蛋白腺含有一个分支的β-d-吡喃半乳聚糖,主要由非还原性端基和3,6-di-O-取代的残基组成,其残基中3-O-和6--的比例较小。 O-取代的单元。现在,13 Cn.mr光谱显示2-氨基乙基膦酸(1)是附加组分,并且通过纤维素板色谱法确认了其存在。此外,分离了在多糖的部分水解上形成的2-氨基乙基膦酸取代的寡糖,通过快速原子轰击质谱法进行了检查,发现其分子量与1的单膦酸酯一致。该混合物的13 Cn.mr光谱表明,O-6处的d-吡喃半乳糖基单元被1的酯取代,并且通过对聚合物进行强酸水解后分离出的单取代的d-半乳糖进行光谱检查,证实了这一点。蜗牛d-半乳聚糖每34个残基含1个酯,它不含蛋白质,脂质和核酸等其他成分,是已鉴定出的第一种此类多糖。