Fig. 4.
PCR detection of tumor clone in case no. 4. (A) Conventional PCR using consensus Fr3 and JH primers. (B) Tumor clone-specific PCR. M, molecular weight marker; P, positive control; N, negative control; G, gastric tumor; SI, small intestinal tumor; MGZ, microdissected cells from the marginal zone; FC, microdissected cells from the follicle center.