The electrophoresis profiles showed the OMP of the 5 serotypes RA isolates had some similarities and shared 7 protein bands with molecular weight of 29KD, 32KD, 36KD, 43KD, 54KD, 57KD and 74KD.

• 五种血清型的RA外膜蛋白存在7个分子量相同的条带，分子量分别为29KD、32KD、36KD、43KD、54KD、57KD和74KD。