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. 2005 Apr 5;102(16):5744–5748. doi: 10.1073/pnas.0501782102

Fig. 2.

Fig. 2.

The effects of inactivation of ccbP and overexpression of ccbP and cam on heterocyst differentiation in Anabaena 7120. (A) Fluorescence image of a wild-type filament. (B) Fluorescence image of CCBP-M grown in the presence of nitrate. (C) Bright-field image of CCBP-M in the absence of combined nitrogen. (D) Bright-field (D1) and fluorescence (D2) images of CCBP-IE grown in the absence of combined nitrogen without copper induction. (E) Fluorescence image of CCBP-IE grown in the absence of combined nitrogen with copper induction. (F and G) Fluorescence images of the wild type expressing a rat CaM gene (cam) and CCBP-M expressing cam in the absence of combined nitrogen with copper induction, respectively. (H and I) Bright-field images of A. variabilis carrying pPpetE-ccbP grown in the absence of combined nitrogen without and with copper induction, respectively. Arrows indicate the positions of heterocysts. (Bar, 10 μm.)