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The Na⁺/Ca²⁺ Exchanger (NCX) protein family is a member of the Cation/Ca²⁺ exchanger superfamily and its members play important roles in cellular Ca²⁺ homeostasis. While the functions of NCX family of proteins is well understood in humans, not much is known about the total complement of Na⁺/Ca²⁺ exchangers in plants and their role in various physiological and developmental processes. In the present study, we have identified all the NCX proteins encoded in the genomes of rice and Arabidopsis and studied their phylogeny, domain architecture and expression profiles across different tissues, at various developmental stages and under stress conditions.

Through whole genome investigation, we identified twenty-two NCX proteins encoded by fifteen genes in rice and sixteen NCX proteins encoded by thirteen genes in …