Differences in BALF glycoprotein expression between breeding lines on days −7, 4, and 20 post infection. Symbols indicate relative expression differences of individual proteins between Hampshire versus German Landrace (black), German Landrace versus Piétrain (white) and Hampshire versus Piétrain (grey). If the quotient was below 1, the negative inverse value is given. For proteins represented by more than one spot on gels, the expression of each isomer was compared separately between the different breeding lines. Identified proteins are marked by diamond symbols, potential isoforms of the respective proteins are represented by circles. AGP: alpha-1-acid glycoprotein, AHSG: fetuin A, BF: properdin B-factor, Hp: haptoglobin, Hb: hemoglobin, HPX: hyaluronidase/hemopexin, IHRP: inter-alpha-trypsin inhibitor family heavy-chain related protein, SERPINA3: alpha-1-antichymotrypsin 3, SP-D: pulmonary surfactant-associated protein D, Tf: transferrin, A1BG: alpha-1B-glycoprotein.