NOS1 and Stroke: To further test whether SNO‐Dexras1 negatively regulates stroke recovery, we constructed a dominant negative Dexras1 in which cysteine‐11 of Dexras1 is replaced with serine (Dexras1‐C11S), since cysteine‐11 is responsible for the nNOS‐mediated activation of Dexras1 [10].