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Fluorescence in situ hybridization with DiGeorge/VCFS TUPLE 1 and DAPI applied to lymphocytes obtained from the peripheral blood. Original magnification, ×100. (A) The patient's probe shows one signal from the 22q11.2 probe in the normal chromosome 22 (red) and two signals from the 22q13.33 probe (green); one in chromosome 22 and the other in the der (15). (B) The control probe, obtained from a male 7-month-old patient was co-hybridized. VCFS, velo-cardio-facial syndrome.
