GFAP and neoplasm: In addition to the one GFAP-SB11 tumor and the 11 new Rosa26-SB11 tumors described above, insertions were re-cloned from DNA isolated from frozen sections of two tumors (68R544 and 76R339p19) previously studied utilizing DNA isolated from paraffin sections [4], bringing the total number of tumors analyzed on the Illumina platform to 14 (Table S1).