Reactivity of the anti-p36 MAbs against whole M. hyopneumoniae antigen (A) and against the cleaved recombinant p36 protein (B). Lanes 1, MAb 11C4; lanes 2, MAb 13B2; lanes 3, MAb 13B7; lanes 4, MAb 13C9; lanes 5, MAb 13G3; lanes 6, MAb 15A3; lanes 7, MAb 15C2; lanes 8, MAb 15E10; lanes 9, 15H3; lanes 10, 15H3; lanes 11, prefusion mouse serum; lanes 12, normal mouse serum; lane M, low-molecular-weight markers.