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Pro‐matrix metalloproteinase‐9 (ProMMP‐9), is increased in membranes of pups at gestational age 18 that were harvested from dams infected with Mycoplasma pulmonis at gestation day 14. Shown are the least‐squares mean ± S.E.M. for pixel intensity for each group (note that data are shown on a logarithmic scale).
