Cryptococcus albidus assimilating pectic substances and its extracellular polygalacturonase.

Pectic Substances

Pectins are a group of plant polysaccharides whose principal component is 1,4-linked a-d-galactosyluronic acid (O’Neill et al., 1990). Pectins are present in the primary cell walls of all seed-bearing plants and in the junction between cells called the middle lamella. The primary wall surrounds growing plant cells, meristematic cells and cells in succulent tissue such as fruit. The secondary wa...

Apple Fruit Pectic Substances.

1. The pectic substances of apple have been extracted and separated into a pure pectinic acid and a neutral arabinan-galactan complex by precipitation of the acidic component with ethanol and with cetylpyridinium chloride. 2. The composition of the fractions has been determined. The pectinic acid contained galacturonic acid, arabinose, galactose, rhamnose, xylose and several trace sugars. 3. Tr...

Hydrolysis of the oligogalacturonides and pectic acid by yeast polygalacturonase.

Yeast polygalacturonase (YPG) is a constitutive type enzyme, produced exocellularly and free of pectinesterase by Saccharomyces jragilis (1). It has an optimal pH of 4.4 and appears to be specific in its activity towards polygalacturonides (2). YPG differs from preparations of commercial fungus polygalacturonase in that it cannot carry out a complete breakdown of pectic acid to galacturonic aci...

Early Diagnosis and Successful Treatment of Cryptococcus albidus Keratitis

Cryptococcus albidus keratitis is a rare and difficult diagnosed disease. Here we report a case of C albidus keratitis early diagnosed by dot hybridization assay and successfully treated with intrastromal injection of Amphotericin B (AB).A 45-year-old man presented with left red eye for 2 days. The slit lamp examination exhibited deep corneal infiltrations. Smears and cultures were performed bu...

Cxxi. the Pectic Substances of Plants