SEROLOGICAL REACTIVITY OF HYDROLYTIC PRODUCTS FROM SILK

Serological Reactivity of Hydrolytic Products from Silk

The foregoing experiments show that products of the hydrolysis of silk that consist of peptides having, from amino nitrogen determinations, molecular weights from about 600 to 1000 were capable of inhibiting the reactions of precipitin sera for silk. From the results it may reasonably be inferred that silk fibroin contains determinant structures not larger than the peptides examined, which prob...

Serological Reactivity of Synthetic Polyglucoses.

Cross-reactivity between H-2K and H-2D products. I. Evidence for extensive and reciprocal serological cross-reactivity

Serological cross-reactivity between the products of the H-2K and H-2D genes has been demonstrated by a design in which antibody was produced against determinants controlled by one locus (e .g . H-2K(k)), and then tested against the product of the opposite locus (e .g . H-2D(d)). A total of 13 out of 18 such test combinations exhibited H-2K-H-2D cross-reactivity. The presence or absence of cros...

Analysis of hydrolytic products from choline-labeled host cell phospholipids during growth of Rickettsia prowazekii.

A phospholipase activity has been associated with the interaction of Rickettsia prowazekii with the surface of erythrocytes and competent host cells as well as during the growth of the rickettsiae within their host cells. Both fatty acid and lysophosphatides have been found in the interaction of rickettsiae with the surface of eucaryotic cells; this finding provided strong evidence for the acti...

A New Sulfur-containing Amino-acid Isolated from the Hydrolytic Products of Protein.*

During an investigation of the cultural requirements of certain bacteria, the writer isolated from the hydrolytic products of casein, a fraction of material which was apparently required by hemolytic streptococci for satisfactory growth, and which was found on examination to contain a considerable amount of sulfur (1). The sulfur was apparently not in the form of cystine since it did not give t...