Objective To prepare polyclonal antibodies against sodium pump alpha 2 subunit M1-M2 extramembrane fragment(NKAα2 EM1) for studying the pathogenesis of hypertension. Methods According to the Gen Bank data, the amino acid sequence of NKAα2 EM1 was obtained and the target peptide(LAAMEDEPSNDN) was synthesized using a peptide synthesizer with Fmoc method and purified with high-performance liquid chromatography. The synthesized peptide was then coupled to KLH for immunizing New Zealand white rabbits for 4 times...