TALENs targeting the ctnna1 locus were designed using the TALE-NT tool (https://tale-nt.cac.cornell.edu/node/add/talen) using the guidelines specified in Cermak et al. (2011) (link). The chosen optimal target sequence in exon 3: 5′- TTGTGTTTATTGCAGGTCACCACACTTGTGAACTCCAGCAACAAAGGTCCA-3′ (binding sites of the left and right TALEN arms are underlined) contains a HphI (NEB) restriction enzyme site (GGTGA). TALENs were generated using the Golden Gate kit (Cermak et al., 2011 (link)) in combination with the obligate heterodimeric FokI pCS2TAL3DD (Addgene, #37275) and pCS2TAL3RR (Addgene, #37276) backbones (Ota et al., 2013 (link)).
TALEN targeting plasmids were linearized with NotI (Promega) after which IVT mRNA was generated using the mMessage mMachine SP6 kit (Ambion), and purified using the RNeasy mini kit (Qiagen).
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