Analysis of LAM from M. tuberculosis recombinants in liquid medium.
M. tuberculosis strains carrying the indicated embCMtb alleles were constructed by gene switching. LAM was analyzed in recombinant strains grown in liquid medium. A, periodic acid-Schiff staining. B, Western blotting using antibody CS-35. C, Western blotting using antibody CS-40. Lane 1, wild-type embCMtb; lane 2, embCMtb N638A; lane 3, embCMtb N652A; lane M, markers. The expected range for migration of LAM and LM is shown for the periodic acid-Schiff-stained gel. The Western blot detects only LAM.