Characterization of a calmodulin binding protein kinase from Arabidopsis thalian

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A full-length calmodulin binding protein kinase cDNA, AtCBK1, from Arabidopsis has been isolated by screening of an Arabidopsis cDNA library and by 5′-RACE. Northern blot and in situ hybridization indicated that the expression of AtCBK1 was more abundant in the vascular bundles and the meristems than in other tissues. The phylogenetic analyses reveal that AtCBK1 is different from animal CaMKs and it falls into CRK subgroup, indicating that they may come from different ancestors. The result suggests that AtCBK1 encodes a CaM-binding serine/threonine protein kinase.
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