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John R. Clamp

Researcher at Bristol Royal Infirmary

Publications -  42
Citations -  1550

John R. Clamp is an academic researcher from Bristol Royal Infirmary. The author has contributed to research in topics: Sialic acid & Mucus. The author has an hindex of 16, co-authored 42 publications receiving 1496 citations.

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Mucin degradation in the human colon: production of sialidase, sialate O-acetylesterase, N-acetylneuraminate lyase, arylesterase, and glycosulfatase activities by strains of fecal bacteria.

TL;DR: It is concluded that the presence of two or more O-acetyl groups on sialic acids inhibits enteric bacterial sialidases but that production of sialate O-acetylesterases by several populations of enteric bacteria lessens the likelihood that mucin oligosaccharide chains terminating in O- acetylated sIALic acids are protected from degradation.
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Abnormal Small Intestinal Permeability to Sugars in Patients with Crohn’s Disease of the Terminal Ileum and Colon

TL;DR: The absorption of lactulose and mannitol in 20 patients with Crohn's disease limited to the ileum or colon was studied, and lactULose/mannitol excretion ratios were calculated, providing support for the concept that Crohn’s disease may be more extensive than is apparent macroscopically.
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Isolation and characterization of C-reactive protein and serum amyloid P component in the rat.

TL;DR: Rat CRP closely resembled human CRP in its amino acid composition, in having five subunits per molecule and in its electron microscopic appearance as a pentameric annular disc, but differed from murine SAP which is a major acute phase reactant.
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Phylogenetic aspects of C-reactive protein and related proteins.

TL;DR: C-reactive protein was discovered by Tillett and Francis’ in the sera of patients with various infectious and inflammatory diseases as a material which precipitated pneumococcal C-polysaccharide (CPS) and was called the “acute phase protein” and this term was subsequently applied to the large number of other plasma proteins.
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The roles of enteric bacterial sialidase, sialate O-acetyl esterase and glycosulfatase in the degradation of human colonic mucin

TL;DR: Faecal extracts from ulcerative colitis patients had higher sialateO-acetyl esterase and glycosulfatase activity, while mucin sialidase activity was unchanged, and the UC mucin was degraded more rapidly by faecal enzyme extracts from both normal and UC subjects.