A ~5-kb section of human EXOC7 locus was amplified with primers (F: AAGGACTGAAGGAGCATTTC, R: CAGGGAGTCGAAGGTCTTCT) from a BAC and cloned into pCAG expression vector. The splice acceptor variant from family I was introduced with site-directed mutagenesis. Wild-type (WT) or splice varian...