Northern blot analyses of the new transcripts. The results obtained by hybridization of cDNA clones to Northern blots with RNA from human (middle) or murine tissues (right) are displayed according to the genomic order of the probes. The names of the cDNA probes employed as well as the transcript sizes are indicated next to the autoradiograms. Quantitative comparison between human and murine expression is limited as the human Northern blots carry poly(A) + RNAs with amounts normalized to β-actin expression, whereas an invariable amount of 20 μg of total RNA of each tissue had been applied to the murine Northern blots. RNA samples used are either derived from whole embryos of embryonic stages E10 through E14 or from adult tissues (heart, he; brain, br; placenta, pl; lung, lu; liver, li; skeletal muscle, mu; kidney, ki; pancreas, pa). For analysis of clone 603000, a testis-derived RNA sample has been added.
