Studies on the Hemolytic Substance Produced at X-Ray Irradiation Part 2. Qualitative Analysis and Biological Action of the Hemolytic Substance

The cause of irradiation anemia seems to lie in biological phenomena as well as in hemolytic toxin produced by X-Ray irradiation. It has been confirmed that since phospholipid fraction in vivo shows strong toxicity in direct proportion to the dose of X-rays, the actual hemolytic substance is lysolecithin. This substance is proved to give rise to marked morphological changes in hematopoietic organs, and it has also been clarified that the same substance acting on sea-urchin egg brings about a delay in egg division. However the same snbstance does not induce any striking change in the respiratory enzyme system.