The proteins of Mycoplasma pulmonis were examined by two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) and immunoblots using the following sera: antimedium, anti-M. arthritidis, anti-M. collis, anti-M. neurolyticum, and anti-M. muris. Fifteen proteins identified as genus-common were shared by M. pulmonis and at least one other mycoplasmal species. These proteins were shown not to be medium components, based on their reaction with antimedium serum.
