Southern blot analysis. Autoradiography of tomato genomic DNA probed with 32P-labeled tomato fructokinase cDNA.
Aliquots (25 ug) of genomic DNA isolated from young tomato leaves were digested with BamHI (B), EcoRI (E), HindIII (H) and KpnI (K).
Digested DNA was separated by gel electrophoresis, transferred to a nylon membrane and probed.
Molecular mass markers are indicated with numbers on left.