Eukaryotic cells have two isozymes of aconitase

• The mitochondrial isozyme (convert citrate to isocitrate in the citric acid cycle)

• The cytosolic isozyme 

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cry1 and cry2 are generally found in the nucleus, cry3 is localized to chloroplasts and mitochondria

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Blue light stimulates the accumulation of anthocyanin (A) and the inhibition of stem elongation by cryptochrome

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In the light, cry1 is activated directly by blue light and indirectly by blue lightinduced phosphorylation. Activated cry1 forms a complex with COP1 and SPA1 via the C-terminal domain, preventing them from degrading protein targets such as HY5

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Both phytochromes and cryptochromes entrain the circadian clock in Arabidopsis.

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Blue light depolarizes membrane of hypocotyl cells and inhibits of growth rate.

This membrane depolarization is caused by the activation of anion channels, which facilitates the efflux of anions such as chloride.