Abstract
Glycopeptides were isolated from tryptic digests of pus from acute pleurisy patients. The hexose, hexosamine, and sialic acid contents rose over the first 2-4 days after admission to the hospital, continued at high levels for 5-8 hospital days, and fell to low levels after 9 hospital days. The course of duration after admission to the hospital was divided into three stages: 1-4 days after admission to the hospital, 5-8 hospital days, and 9-21 hospital days. Materials corresponding to these three stages were then collected for fractionation by DEAE-cellulose column chromatography. Fractionation of glycopeptides by DEAE-cellulose column chromatography yielded three glycopeptide fractions at 0.05 to 0.2 M NaCl. Column chromatography of crude material on DEAE-cellulose showed an increase in the 0.2 M NaCl fraction from the concentrate over a period of 4-8 hospital days due to a large increase in sialic acid-rich glycopeptide fraction.
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