Leucine-rich repeat transmembrane neuronal protein 1 (LRRTM1) is a protein that in humans is encoded by the LRRTM1gene.
LRRTM1 is the first gene linked to increased odds of being left-handed, at least if inherited from the father's side. Possessing one particular variant of the LRRTM1 gene slightly raises the risk of psychoticmental illnesses such as schizophrenia, again only if inherited from the father's side.
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