Northern blot of patient samples probed with RFC and 36B4 as a loading control. (A) Patient sample (no. 26) with normal RFC expression and patient sample (no. 58) with no detectable RFC expression relative to CCRF-CEM (CEM-S) cell line. (B) Patient sample (no. 36) with decreased RFC expression relative to the CCRF-CEM (CEM-S) cell line.