To study the functional differences of calcium-dependent protein kinase gene 1( CDPK1) in different habitats,2 calcium-dependent protein kinase genes GhC DPK1 and SikC DPK1 were obtained from coldness-sensitive crop Gossypium hirsutum and hardy plant Sasussured involucrata Kar. et Kir,respectively. GhCDPK1 gene contains a 1 764-bp open reading frame encoding 587 amino acids,and SikC DPK1 contains a 1 716-bp open reading frame encoding 571 amino acids. The corresponding proteins are unstable,hydrophilic and ...