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Biomedical subjects

D Tills

Publications and source records attributed to D Tills.

At least 37 records · Page 2Linked to original sources
PubMed1976

Sunshine and the geographical distribution of the alleles of the Gc system of plasma proteins.

Following the discovery by Daiger et al. (1975) that the Gc proteins of human plasma act as the carriers of vitamin D, the authors have plotted on a world map all available data on the frequency of the allele Gc2, and compared the distribution with that of sunlight. With some exceptions high frequencies of Gc2 correspond to low levels of sunlight and vice versa. Similar comparisons within Ireland show no such relation. The results are discussed in relation to natural selection and the incidence of rickets, due to vitamin D deficiency.

Alleles↗
PubMed1976

The occurrence of Hb E Saskatoon in Scotland.

The finding of several examples of Hb E Saskatoon in the Orkney Islands, in Edinburgh and in individuals of Scottish descent in Canada but nowhere else, suggests that the original mutation occurred in Scotland, perhaps in the Orkneys.

Genetics, Population↗
PubMed1976

The blood groups, serum groups, red-cell isoenzymes and haemoglobins of the Sandawe and Nyaturu of Tanzania.

Blood specimens from members of the click-speaking Sandawe tribe of Tanzania and of the adjacent Bantu-speaking Nyaturu tribe have been tested for antigens of 11 blood group systems, for variants of 3 plasma-protein systems and 9 red-cell-enzyme systems, for haemoglobin variants. The results are tabulated and gene frequencies computed. For most systems, the frequencies in the two tribes are similar to one another and, in so far as data are available, similar to the neighbouring Bantu-speaking tribes. The principal genetic difference between the Sandawe and the Nyaturu is in their frequencies of haemoglobin S and of glucose-6-phosphate dehydrogenase deficiency, both of which characters are several times higher in the Nyaturu than in the Sandawe; both characters are protective against falciparum malaria, and this suggests that the Nyaturu have in the past been much more strongly exposed to this infection than the Sandawe.

Black People↗
PubMed1975

Studies of the genetic susceptibility of individuals to infection with influenza viruses.

Nearly three and a half thousand sera obtained from various populations were tested serologically to obtain evidence of past infection with influenza A viruses that were prevalent from 1947 to 1972. No significant difference was found between the distributions of the levels of these antibodies of individuals of blood groups A and O, A1 and O, Rh (D+) and Rh (D-) and MM, MN and NN. The significance of these findings is discussed.

ABO Blood-Group System↗