MTRR (Methionine Synthase Reductase): MTRR is crucial for regenerating methylcobalamin, ensuring the continuous function of MTR in homocysteine metabolism. It plays a key role in maintaining adequate methionine levels and supports normal DNA synthesis. MTRR mutations are associated with homocystinuria, which can lead to developmental and neurological issues. Insights into MTRR function offer potential for genetic disorder therapies....