Figure 2From: A study of two Chinese patients with tetrasomy and pentasomy 15q11q13 including Prader-Willi/Angelman syndrome critical region present with developmental delays and mental impairment Partial karyotype and FISH analysis. Patient 1: (a) partial karyotype of derivative chromosome 15. FISH study using probes for SNRPN locus (orange, short arrows) at 15q11q13 and PML locus (green, long arrows) at 15q22: (b) interphase cells and (c) SMC15. Patient 2: (d) partial karyotype of inv dup(15), FISH using SNRPN and PML probes: (e) interphase cells and (f) inv dup(15q).Back to article page