Electrophoretic profiles of LPS from the NTHi parent and corresponding allelic exchange and mutant strains. (A) Strain 1008 and corresponding mutant and allelic exchange strains. Lane 1, 1008; lane 2, 1008lex2B; lane 3, 1008lex2Glc1008; lane 4, 1008lex2Gal1124. (B) Strain 1247 and corresponding mutant and allelic exchange strains. Lane 1, 1247; lane 2, 1247lex2B; lane 3, 1247lex2Gal432; lane 4, 1247lex2Glc1008; lane 5, 1247lex2Gal1124; lane 6, 1247lex2Glc1247. (C) Strains 2019 and 1124 and corresponding mutant and allelic exchange strains. Lane 1, 2019; lane 2, 2019lex2B; lane 3, 2019lex2Glc1247; lane 4, 2019lex2Glc1292; lane 5, 2019lex2Gal2019; lane 6, 1124; lane 7, 1124lex2B; lane 8, 1124lex2Glc1008; lane 9, 1124lex2Gal1124.