A dipeptide repeat protein (DPR) that accumulates in ALS as a result from mutations in the C9orf72 gene. DPRs have the potential to be used as biomarkers. Poly (GA) is the most abundant DPR in ALS and FTD patients with mutations in C9orf72, and contributes to TDP-43 abnormalities and neuron loss
poly (GA)
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