Northern blot analysis.

Lanes 1 to 15 contain approximately 2 μg poly A⁺ RNA from (in the following order): bone marrow, adrenal gland, trachea, lymph node, spinal cord, thyroid, stomach, peripheral blood leukocytes, colon, small intestine, uterus, testis, prostate, thymus, and spleen. The 2.5-kb and 6.6-kb Kell transcripts are marked by arrows. Hybridization was performed with radioactive Kell antisense RNA (upper panel) or with radioactive β-actin cDNA (lower panel).