Tissue distribution of the corresponding gene (NOR1) transcripts detected by 15T01. (A) Total RNA (15 μg) was isolated from various mouse tissues. (B) One microgram of poly(A)+ RNA was isolated from mouse kidney or Mm-A cells. Northern blots were sequentially hybridized with the 15T01 (top) and β-actin probes (bottom). Size markers (in kilobases) are shown on the left.