Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “eggshell”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 199 records · Page 11Linked to original sources
PubMed1991

Evolution of the dec-1 eggshell locus in Drosophila. I. Restriction site mapping and limited sequence comparison in the melanogaster species subgroup.

We have analyzed approximately 18 kb of DNA in and upstream of the defective chorion-1 (dec-1) locus of the eight known species of the melanogaster species subgroup of Drosophila. The restriction maps of D. simulans, D. mauritiana, D. sechellia, D. erecta, and D. orena are shown to have basically the restriction map of D. melanogaster, whereas the maps of D. teissieri and D. yakuba were more difficult to align. However, the basic amount of DNA and sequence arrangement appear to have been conserved in these species. A small deletion of varying length (65-200 bp) is found in a repeated sequence of the central transcribed region of D. melanogaster, D. simulans, and D. erecta. Restriction site mapping indicated that the dec-1 gene is highly conserved in the melanogaster species subgroup. However, sequence comparison revealed that the amount of nucleotide and amino acid substitution in the repeated region is much larger than in the 5' translated region. The 5' flanking region showed noticeable restriction site polymorphisms between species. Based on calculations from the restriction maps a dendrogram was derived that supports earlier published phylogenetic relationships within the melanogaster species subgroup except that the erecta-orena pair is placed closer to the melanogaster complex than to D. teissieri and D. yakuba.

Amino Acid Sequence↗
PubMed1985

Synergistic effects of 1,25(OH)2D3 and 24,25(OH)2D3 on duodenal CaBP in rachitic chicks and on eggshell weight in Japanese quails.

The role of 24,25(OH)2D3 in calcium homeostasis is still controversial. In the present study the administration of low doses of 1,25(OH)2D3 and of higher doses of 24,25(OH)2D3 either alone or in conjunction with each other, were studied in rachitic chicks and in Japanese quails. Whereas 24,25(OH)2D3 alone had no significant effect on duodenal CaBP and on alkaline phosphatase in chick serum, it increased the influence of 1,25(OH)2D3 on these two parameters strongly. Also, when 1,25(OH)2D3 and 24,25(OH)2D3 were given simultaneously to Japanese quails, calcium excretion via the egg shell was clearly higher than when either metabolite had been administered alone. These results indicate that 1,25(OH)2D3 and 24,25(OH)2D3 exert a strong synergistic effect in rachitic animals.

24,25-Dihydroxyvitamin D 3↗