Quantification of kl-2 transcripts in testis RNA by RT-qPCR. The RT step was performed with random hexamer primers. (A) qPCR amplicons targeted by designed primer sets are indicated by orange bars. The primers span exon-exon junctions to amplify only spliced transcripts, except for the first amplicon, which targets exon 1. Black lines indicate intron regions not included in the amplicons. (B) qPCR amplicons targeted by designed primer sets are indicated by gray and orange bars, which indicate intron and exons regions, respectively. At least one primer in each primer set targets an intron and therefore the primer sets target kl-2 transcripts before splicing (pre-mRNAs). Data were normalized to actin5C mRNA and the means of macanull/+. Mean +/- SD (n = 3 biological replicates). P-values <0.05 (Student’s t-test, unpaired, two-tailed) are indicated by *.