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Dynamic filtration of the positional error at a level of zygotic gene expression. We consider the standard deviations (s.d.) in the positions of the posterior border of the anterior hb domain, maximum of the central Kr domain, and the posterior border of the early eve domain, that later corresponds to the position of the eve 3rd eve stripe. Changes in the positional error of these domains are compared to the level of variability in position of the 12 % concentration threshold of the Bcd protein gradient. All these features have approximately the same positions along the A-P axis of an embryo (45-55 % embryo length). In cycle 14A we show the Bcd variability only for time class 1, as it remains at the same level thereafter.
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An analysis of the quantitative data obtained by processing the confocal images showed that the early variability of expression patterns of zygotic segmentation genes in Drosophila drastically decreases by the time of the onset of gastrulation. The following components of variability were examined: the scatter of the levels of gene expression in di...
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Context 1
... recently demonstrated that the level of positional error of the eve domain in cycle 13 is as high as that of the Bcd protein gradient ). After the formation of stripes the variability within the eve expression pattern becomes lower. The latest results showed that the positional variability is dynamically filtered in all examined zygotic genes (Fig. 3). The positional error of the eve pattern in the middle of cycle 14A is three times lower than that in cycle 13 and at time class 1. In Kr and hb the early variability also decreases dynamically before time class 2 and doesn't change thereafter (Fig. 3). We conclude that the positional error is dynamically filtered during the first 20 ...
Context 2
... showed that the positional variability is dynamically filtered in all examined zygotic genes (Fig. 3). The positional error of the eve pattern in the middle of cycle 14A is three times lower than that in cycle 13 and at time class 1. In Kr and hb the early variability also decreases dynamically before time class 2 and doesn't change thereafter (Fig. 3). We conclude that the positional error is dynamically filtered during the first 20 minutes of cycle 14A. ...
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