The sporadic case of haemophilia A

Plasma samples from 41 mothers of haemophilic sons in "simplex families" (families with only one affected member) have been tested for factor VIII and factor-VIII-related antigen. The results suggest that 39 of these women are likely to be carriers of haemophilia.

The estimation of the number of binding sites for antibody on antigen molecules with reference to factor VIII and its antibody

The theoretical basis for determining the number of antibody sites on antigen molecules is examined. The theoretical considerations are applied to factor VIII molecules. Examples based on data available at the Oxford Haemophilia Centre are calculated to illustrate the approach. It is concluded that there are few sites on each factor VIII molecule for human antibody. The three antibodies for which reasonable data were available suggest 1-3 sites for human antibody. The data for rabbit antibody suggest 5-6 sites per factor VIII molecule.

Post-Infectional Compounds From the French Bean Phaseolus vulgaris; Isolation and Identification of Genistein and 2',4',5,7-Tetrahydroxyisoflavone

The isolation and identification of two isoflavones from fungal- infected pods of Phaseolus vulgaris L. is described. One, genistein, is known to occur in other legumes. On the basis of ultraviolet and p.m.r. spectroscopy and of mass spectra, the second compound was tentatively identified as 2?,4?,5,7-tetrahydroxyisoflavone.