RNA was retrotranscribed with the M-MLV retrotranscriptase (ThermoFisher Scientific, Waltham, MA, USA) and random primers. HotStart Taq polymerase (Qiagen) was used for METΔex14 and EML4-ALK amplification using a 20 µL reaction (45 cycles) and visualized in agarose gels, as described [9 (link),11 (link)]. Positive samples were confirmed by bidirectional Sanger sequencing of RT-PCR products, using the big-dye 3.1 sequencing kit (Applied Biosystems, Foster City, CA, USA).
Free full text: Click here