摘要 : Standard oligo-i-carrageenans were produced with t-carrageenases isolated from the marine bacteria Alteromonas fonts and Pseudolalteromonas atlantica. The carrageenans were then desulfated using a 4S-carrageenan-sulfatase purified... 展开 Standard oligo-i-carrageenans were produced with t-carrageenases isolated from the marine bacteria Alteromonas fonts and Pseudolalteromonas atlantica. The carrageenans were then desulfated using a 4S-carrageenan-sulfatase purified from P. atlantica. Using chromatography and NMR analyses, we characterized a series of new standard neo-α-carrageenan oligosaccharides. 收起