Detecting changes in a multi-element display

2009 ◽  
Author(s):  
Cheng-Ta Yang ◽  
Yung-Fong Hsu ◽  
Yei-Yu Yeh
Keyword(s):  
Element Display

scholarly journals Phenotypic and molecular analysis of the facets, a group of intronic mutations at the Notch locus of Drosophila melanogaster which affect postembryonic development.

Genetics ◽  
1989 ◽  
Vol 122 (2) ◽  
pp. 417-428 ◽  
Author(s):  
K Markopoulou ◽  
W J Welshons ◽  
S Artavanis-Tsakonas
Keyword(s):  
Drosophila Melanogaster ◽  
Transposable Element ◽  
Larval Instar ◽  
Postembryonic Development ◽  
Mutant Phenotype ◽  
Transcriptional Analysis ◽  
Mutational Event ◽  
Recessive Mutations ◽  
Notch Locus ◽  
Element Display

Abstract The function of the Notch locus of Drosophila melanogaster is essential for normal development both during embryogenesis and during postembryonic stages. In the embryo its function is necessary for the correct segregation of neural from epidermal lineages. During postembryonic stages Notch exhibits pleiotropic effects that are both tissue- and stage-specific. Here, we examine a group of six recessive mutations, the facets (fa, fa3, fag, fag-2, fafx and fasw), which affect eye morphology and have been previously shown to be associated with the insertion of transposable elements in an intronic region of Notch. The analysis of revertants has shown that the mutant phenotype depends on the presence of the transposable element and that the disruption of the wild-type sequence organization per se is not its cause. Four of these alleles, even though they are associated with the insertion of the same transposable element, display considerably different phenotypes. Therefore, no simple correlation exists between the mutant phenotype and the type of inserted element. A comparison of the tissue localization of the Notch and the transposable element transcripts revealed that in the third larval instar the elements are transcribed in both orientations in tissues in which Notch is also transcriptionally active. The complexity of the defects associated with the facet alleles, as well as the findings of the transcriptional analysis, indicate that a mutational mechanism based solely on transcriptional interference is not sufficient to explain the nature of the mutational event. It is likely that in these mutations alterations, in the temporal and/or spatial context caused by transcriptional and perhaps posttranscriptional interference mechanisms by the inserted elements, may be responsible for the mutant phenotype.

A critical chromosome analysis of Glossina austeni Newst. (Dipt., Glossinidae)

1972 ◽  
Vol 62 (2) ◽  
pp. 195-198 ◽  
Author(s):  
D. I. Southern ◽  
T. A. Craig-Cameron ◽  
P. E. Pell
Keyword(s):  
Chromosome Number ◽  
Fluorescence Microscopy ◽  
Rna Synthesis ◽  
Nuclear Division ◽  
Chromosome Analysis ◽  
Diploid Chromosome Number ◽  
Differential Staining ◽  
Glossina Austeni ◽  
Element Display

The diploid chromosome number of G. austeni Newst. from the Langford colony is 2n = 14 ± 2, + XX/XY. Chromosomes have been karyotyped and include a pair of large submetacentrics (L1), a pair of shorter metacentrics (L2) and a group of small telocentries (S). The X and Y elements constitute a heteromorphic pair. The S chromosomes together with the Y element display allocyclic behaviour during nuclear division. Pre-meiotic RNA synthesis has been followed by autoradiography, and differential staining of DNA with quinacrine dihydrochloride by fluorescence microscopy.

A Fully Integrated RF-Powered Contact Lens With a Single Element Display

2010 ◽  
Vol 4 (6) ◽  
pp. 454-461 ◽  
Author(s):  
Jagdish Pandey ◽  
Yu-Te Liao ◽  
Andrew Lingley ◽  
Ramin Mirjalili ◽  
Babak Parviz ◽  
...  
Keyword(s):  
Contact Lens ◽  
Single Element ◽  
Fully Integrated ◽  
Element Display
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