FIG. 1.

Immunoprecipitation of HLA-B27 molecules from noninfected and infected JT1 cells. JT1 cells were infected either with the invasive strain S. flexneri M90T or with the noninvasive strain BS176. Sixty minutes after infection, cells were washed and incubated for a further 60 min with [³⁵S]methionine; 2.8 × 10⁶ cells were lysed, and the lysate was precleared before immunoprecipitation using MAb B1.23.2, specific for HLA-B,C. The gel was loaded in duplicate.