the structures of the capsular k18 , k22 , and k100 antigens of e. coli o23 : k18 : h15 , o23 : k22 : h15 , and o75 : k100 : h5 , respectively , were elucidated by determination of composition , 1h- , 13c- , and 31p-n.m.r . spectroscopy , periodate oxidation , alkaline hydrolysis followed by incubation with alkaline phosphatase , and methylation analysis of the polymers and their neutral fragmentation products .
C0020291
hydrolysis
C0002059
alkaline phosphatase