Calmodulin is a calcium binding protein that modulates the activity of diverse groups of protein including some protein kinase, adenylate cyclases and ATPase. Here we use the total DNA of Sonneratia paracaseolaris as the template of the polymerase chain reaction (PCR). The PCR primers have been designed and synthesized according to the 5-and 3-terminal oligonucleotide sequences of Calmodulin gene of plants in Genbank and ligated with cloning vector pBsk(+).The recombinant clones have been obtained from the selected medium. The results of DNA sequences analysis show that the nucleotide sequences of ORF share more than 85% homologies as compared with those of calmodulin genes of several other plants.Similar to rice and apple, the ORF is interrupted by an intron behind the 75th nucleotide.
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