[Celiac disease in Piedmont. An epidemiological-clinical study].

The incidence of coeliac disease (CD) was calculated on 304 patients under eighteen who were born in the city of Turin and its province in the years 1975-1989; the prevalence on 494 patients who live in the Piedmont Region. The mean crude yearly incidence was 0.511/1000 (1:1957 live birth).

Presence of circulating anti-c-myb oncogene product antibodies in human sera.

Bacterially expressed mouse c-myb protein was purified from E. coli extracts and used as antigen to screen human sera for circulating anti-c-myb oncogene product antibodies. Using Western blotting, we have found that human sera contain IgG antibodies to the c-myb gene product.

Abnormal genetic segregation associated with the presence of a Y. w+ chromosome in Drosophila melanogaster.

We have observed an abnormal genetic segregation in the progeny of crosses between males of the F71 (y wa/Y.w+) strain and females of various strains carrying marker mutations on their chromosome 2. The Y.

Comparison between the molecular characteristics and the potential activity of X and Y nucleolar organizers from various Drosophila melanogaster laboratory lines.

The molecular characteristics of nucleolar organizers from X and Y chromosomes of different Drosophila melanogaster lines have previously been studied (17). By analysis of appropriate genetic crosses we show in the present study that the X and Y chromosomes of these lines can confer different degrees of resistance on an inhibitor of ribosomal RNA synthesis (beta exotoxin or thuringiensin) present in the thermostable supernatant of Bacillus thuringiensis cultures. None of the lines studied gives rise to any particular phenotype under normal culture conditions; variations in the degree of supernatant resistance of these lines provide a relative measure of what can be called the potential activity of the nucleolar organizers of the different X and/or Y chromosomes.