region immediately following TAG stop codon of Irs1
ensembl-ucsc genomic ------------------------------------------------------------------ cgtaactggacatcacagcag gtgcgtttttatggtggcaaagtcagaagacaaaagtgcttttaccatggggtgcttgagttctgttccttcccctccttctcttcccactccttcccacagtgtccttggggaggatactttttcaggaggtgtgggggtggggtggggaagggtcagggtacacagatgctcacctcgcattgacacctggcagatagtcaaagaactgtgtttggagcagccacagaagggcttctctct
ppNT3loxP (mock floxed) ggtacccgccggccgctcgagataacttcgtataatgtatgctatacgaagttatggatccAATAG cttaactggacgtcacagcag gtgcgtttttatggtggcaaagtcagaagacaaaagtgcttttaccatggggtgcttgagttctgttccttcccctccttctcttcccactccttcccacagtgtccttggggaggatactttt-caggaggtgtgggggtggggtggggaagggtcagggtacacagatgctcacctcgcattgacacctggcagatagtcaaagaactgtgtttggagcagccacagaagggcttctctct
Kpn-Eag-Xho-loxP-Bam-(repeat of 5bp at stop: aatag) 3' UTR (1) gt splice donor site of deletion
kis have above extra 66 bp
but PCR products may differ by only 65 bp because of single bp deletion in pPNT3-Irs1-3loxP