CS-PCR in MM patient time point samples. A representative CS-PCR-A in patients MM1 to MM4 is shown above the panel. BM indicates bone marrow; BL, blood. Time point number is given for each sample, and the time between samples is indicated below the panel. Molecular weight markers are shown on the right. Faint secondary bands below the strong CS-PCR band arise from nonspecific priming by the downstream Sγ1 primer.