Genotyping of the candidate SNPs LEPREL1:g.139212C>G, KRT3:g.2584C>T as well as the polydactyly-associated polymorphism in LMBR1 (DC-2) was performed using restriction fragment length polymorphisms according to standard protocols [52 (link)]. DC-2 primers were obtained from previous study [18 ]. In addition the missense variants CEP164:g.57380G>T and COL28A1:g.159951T>A were validated using Kompetitive Allele Specific PCR (KASP) genotyping assays (LGC, Middlesex, UK) [53 ]. After the KASP standard thermal cycling touchdown protocol was run on a thermocycler TProfessional 96 (Biometra, Göttingen, Germany) using an annealing temperature of 61 °C (Additional file 12), allelic discrimination was performed on the ABI7300 sequence detection system (Applied Biosystems, Waltham, Massachusetts, USA).
Free full text: Click here