Polyacrylamide gel shows TCR spectratype analysis of T cells from patient 1 (A), patient 2 (B), and a normal subject (C) after 14 days of culture in the presence of heparin:PF4. The spectratypes shown were generated using template cDNA diluted 1:100 (patient 1) and 1:10 (patient 2 and normal subject) to illustrate the dominant PCR products.