Diagnosis of Spinal Muscular Atrophy: A Simple Method for Quantifying the Relative Amount of Survival Motor Neuron Gene 1/2 Using Sanger DNA Sequencing.
p.Val19Glyfs*21 and p.Leu228* variants in the survival of motor neuron 1 trigger nonsense-mediated mRNA decay causing the SMN1 PTC+ transcripts degradation.