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Fig. 2. Quantification of GBE in wild-type and mutant backgrounds.
Progression of the posterior tip of the germband in wild type (wt,
A-D), and in string (E-H) and eve (I-L)
mutants. Representative frames are shown at 5 (A,E,I), 15 (B,F,J), 25 (C,G,K)
and 180 (D,H,L) minutes. (M-P) Quantification of germband elongation
(GBE) progression. This was plotted as a percentage of egg length progressed
over time. The fast phase occurs during the first 25 minutes, whereas the slow
phase takes place during the subsequent 70 minutes. The average from five
embryos is shown (with standard error). Notice that, in string
mutants (N) (cell divisions are absent), the germband elongates more slowly
than in wild-type embryos (M). Total elongation is less in eve
embryos than in string mutants or in wild-type embryos (P). (P)
Composite of M, N and O, with the error bars removed for clarity. (Q)
Average velocity of the tip of the germband in the three genetic backgrounds
during the first 45 minutes of extension. Fitting curves were drawn for a
better view of the data.
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