Abstract
Statistically significant correlations were obtained between a chemical assay for the proportion of colonic epithelial glycoprotein sialic acids with side chain O-acyl substituents and two histochemical methods, the PBT-KOH-PAS sequence (rs = 0.7485 for N = 31, P = 0.01, one-sided test) and the PAPT-KOH-Bh-PAS procedure (rs = 0.7024 for N = 34). A positive correlation (rs = 0.8654 for N = 30, P = 0.01) was also obtained between the results of the two histochemical procedures. It is concluded that, on average, histochemical observations are a reliable semiquantitative comparative method for the estimation of side chain O-acetylated sialic acids.
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