“…To identify those human chromosome(s) mandatory for PAg presentation, hybrid cells were cloned and tested for induction of reporter cell stimulation in the presence of 1 nM HMBPP. PCR karyotyping showed that loss of human chromosomes 2,3,7,8,9,10,11,13,17,18,20,21, and X had no effect on PAg-mediated activation of the reporter cells, while cells without Chr6 failed to induce activation of the reporter cells in the presence of HMBPP or zoledronate. For reasons so far unknown, 2 of 6 of the Chr6-bearing hybridoma cell lines stimulate the reporter cells in the presence of HMBPP and zoledronate but not in the presence of 2 mM sec-butylamine.…”