The kinase catalytic domain is 264 amino acids in length and contains all of 11 conserved subdomains and 15 invariant amino acid residues essential fo r eukaryotic serine / threonine protein kinases 激酶区长264个氨基酸残基，具有所有11个保守的亚结构域和15个对于真核生物丝氨酸苏氨酸蛋白激酶所必需的保守的氨基酸残基。
