834 resultados para Eye pattern
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Weekly Newsletter from the Northwest District Office for libraries containing programs, activities, classes for the upcoming week.
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Weekly Newsletter from the Northwest District Office for libraries containing programs, activities, classes for the upcoming week.
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In ants, energy for flying is derived from carbohydrates (glycogen and free sugars). The amount of these substrates was compared in sexuals participating or not participating in mating flights. Results show that in participating females (Lasius niger, L. flavus, Myrmica scabrinodis, Formica rufa, F. polyctena, F. lugubris), the amount of carbohydrates, especially glycogen, was higher than in non-participating females (Cataglyphis cursor, Iridomyrmex humilis). Similarly, male C. cursor and I. humilis which fly, exhibit a much higher carbohydrate content than do the non-flying females of these species. Furthermore, the quantity of carbohydrates stored was generally higher in males than in females for each species. These results are discussed with regard to the loss of the nuptial flight by some species of ants.
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Weekly Newsletter from the Northwest District Office for libraries containing programs, activities, classes for the upcoming week.
Resumo:
Weekly Newsletter from the Northwest District Office for libraries containing programs, activities, classes for the upcoming week.
Resumo:
Weekly Newsletter from the Northwest District Office for libraries containing programs, activities, classes for the upcoming week.
Resumo:
Weekly Newsletter from the Northwest District Office for libraries containing programs, activities, classes for the upcoming week.
Resumo:
Weekly Newsletter from the Northwest District Office for libraries containing programs, activities, classes for the upcoming week.
Resumo:
Weekly Newsletter from the Northwest District Office for libraries containing programs, activities, classes for the upcoming week.
Resumo:
Weekly Newsletter from the Northwest District Office for libraries containing programs, activities, classes for the upcoming week.
Resumo:
Weekly Newsletter from the Northwest District Office for libraries containing programs, activities, classes for the upcoming week.
Resumo:
Weekly Newsletter from the Northwest District Office for libraries containing programs, activities, classes for the upcoming week.
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Early ocular development is controlled by a complex network of transcription factors, cell cycle regulators, and diffusible signalling molecules. Together, these molecules regulate cell proliferation and apoptosis, and specify retinal fate. NKX5-3 is a homeobox transcription factor implicated in eye development. The analysis of the 5'-flanking region of the mouse Nkx5-3 gene revealed a predicted TATA-less promoter sequence between -416 and -166 of the translation start site. To functionally characterise Nkx5-3 promoter activity, serial deletions of the promoter sequence were introduced in pGL-3 basic vector and promoter activity of these 5'- and 3'-deleted constructions was tested in HeLa and CHO cells. Transactivation assays identified a region between -350 and -296 exhibiting promoter-like activity. Combined analysis by deletions and point mutations showed that this sequence, containing multiple Sp1 binding sites was necessary to promote transcriptional activity. Binding of Sp1 to this region was confirmed by electrophoretic mobility shift assay (EMSA) and chromatin immunoprecipitation, using an antibody specific for Sp1. Altogether, these results demonstrated that the immediate upstream region of Nkx5-3 gene possessed a strong intrinsic promoter activity in vitro, suggesting a potential role in Nkx5-3 transcription in vivo.
Resumo:
Weekly Newsletter from the Northwest District Office for libraries containing programs, activities, classes for the upcoming week.
Resumo:
Weekly Newsletter from the Northwest District Office for libraries containing programs, activities, classes for the upcoming week.
