This antibody revealed a faint band approximately 80 kDa (where ASIC2a was detected with the specific antibody) and a main band approximately 55 kDa, which was absent in the kidney of ASIC2b–/– rats, indicating the presence of a t-ASIC2b protein in CC-PAN rat kidneys. This evidence concerns the gene ASIC2 and polyarteritis nodosa.