The neutral salt-soluble collagen which accumulates in the tissues of animals treated with penicillamine does not differ from normal in amino acid composition, specific optical rotation, and melting temperature. It has higher intrinsic viscosity, possibly due to a contamination with higher molecular weight aggregates originating from the depolymerization of insoluble collagen. In contrast to th...

The elastolytic activities of 82 Bacteroides nodosus strains were studied. Two substrates, insoluble elastin and soluble elastin, were used for this purpose. Roughly 15% of the strains which did not digest insoluble elastin were elastolytic with soluble elastin, the latter providing greater sensitivity, speed, and objectivity than its insoluble counterpart.

Degradation pathways of insoluble proteins have been analyzed in Escherichia coli by using a N-terminal beta-galactosidase fusion protein (VP1LAC) that aggregates immediately after its synthesis. In recombinant E. coli cells, lower molecular mass products, antigenically related to the entire fusion, accumulate together with the entire fusion. In absence of protein synthesis, the insoluble intac...

The design and synthesis of Lys- and Arg-containing peptides as solubilizing tags were studied to evaluate their influence on polarity. The relevance of spatial arrangement of polar groups, in α- or ε-amino positions, was confirmed by chromatographic analysis of a rational PolyLys-based synthesized structure. The most promising of the solubilizing tags here analyzed was conjugated to a commerci...

Polydimethylsiloxanes as Surface-Active Ingredients in Antifoams Silicone oils, or in particular polydimethylsiloxane (PDMS) materials, combine many unusual properties because of their molecular characteristics, such as the flexibility of the SiO-Si backbone and the very low cohesive energy existing between methyl groups. PDMS polymers have low surface tension, and most of them are nonvolatile ...

This study was performed to determine the effects of feeding a fiber-rich fraction of Brassica vegetables on the immune response through changes in enteric bacteria and short-chain fatty acid (SCFA) production in normal mice. The boiled-water-insoluble fraction of Brassica rapa L. (nozawana), which consists mainly of dietary fiber, was chosen as a test material. A total of 31 male C57BL/6J mice...