In Part 3 (Smith, 1951) of this series a virulenceenhancing fraction of hog gastric mucin was separated from the insoluble particulate residue. This residue had an adjuvant action on the enhancement ofthe virulence by the activefactor comparable with that already demonstrated (Smith, 1950b) for the viscosity of the original mucin. However, using a biological assay involving a medium of constant...

A glycopeptide (also called mucopeptide) fraction of bacterial cell walls, believed to be associated with shape and structural stability of microorganisms, may, in the case of Group A streptococci, be isolated with relative ease as the formamide-insoluble residue of protease-treated cell walls (1). Analyses and certain susceptibilities to enzymic lysis of this fraction have been reported (1, 2)...

About 70% of the protein in isolated Bacillus subtilis spore coats was solubilized by treatment with a combination of reducing and denaturing agents at alkaline pH. The residue, consisting primarily of protein, was insoluble in a variety of reagents. The soluble proteins were resolved into at least seven bands by sodium dodecyl sulfate gel electrophoresis. About one-half of the total was four p...

The platelet integrin, glycoprotein IIb-IIIa (GPIIb-IIIa), serves as the receptor for fibrinogen. This study examined what effect GPIIb-IIIa receptor occupancy had on the cytoskeleton of resting and activated platelets. Triton X-100-insoluble residues (cytoskeletons) were isolated from resting washed platelets incubated with either 500 microM RGDS or 500 microM RGES and examined for protein con...

Triton X-100 solubilizes membranes of PC12 cells and leaves behind a nucleus and an array of cytoskeletal filaments. Nerve growth factor (NGF) receptors (10% of those found in intact cells) are associated with this Triton X-100-insoluble residue. Two classes of NGF receptors are found on PC12 cells which display rapid and slow dissociating kinetics. Although rapidly dissociating binding is pred...

This work describes the newly discovered zeolites in eastern region of Cuba. In researched area, there have been no previous studies natural zeolite exploration. Therefore, results shown here are new. The main object this research is to analyse five samples and demonstrate their pozzolanic capacity possibility usage industrial manufacturing cements. study was performed by X-ray diffraction (XRD...