نتایج جستجو برای: polysialic acid
تعداد نتایج: 747457 فیلتر نتایج به سال:
We characterized the genetic defect of a capsule-deficient serogroup B meningococcal strain created by Tn916 mutagenesis. The transposon insertion interrupts a capsule biosynthesis gene, synX, which is involved in the production of N-acetyl-D-mannosamine, a precursor of the (alpha 2-->8)-linked polysialic acid capsule of serogroup B meningococci.
We describe hamartomas of possible thalamic origin. CT revealed marked calcification in the mass lesion, and MR imaging revealed contrast enhancement. Histologically, outgrowth of the glia was observed, but no neoplastic component was confirmed. Immunohistochemical staining was positive for the cell-adhesion factor N-CAM and negative for polysialic acid.
O acetylation at carbon positions 7 or 9 of the sialic acid residues in the polysialic acid capsule of Escherichia coli K1 is catalyzed by a phase-variable contingency locus, neuO, carried by the K1-specific prophage, CUS-3. Here we describe a novel method for analyzing polymeric sialic acid O acetylation that involves the release of surface sialic acids by endo-N-acetylneuraminidase digestion,...
Monoclonal antibodies (MAbs) 123C3 and 123A8 generated against a membrane preparation of a small cell lung carcinoma (SCLC) specimen recognize not only SCLC and bronchial carcinoids but also a significant portion of non-small cell lung carcinomas (non-SCLC) of various histological types. Together with 13 other monoclonal antibodies, which show preference for SCLC, they have been ranked as SCLC ...
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