COL4A2 and Stroke: The most prevalent COL4A2 gene variants, identified through WES in all our stroke patients, include COL4A2 rs4238272 (c.297G > A), COL4A2 rs439831 (c.3804T > A), COL4A2 rs409858 (c.3807T > C), and COL4A2 rs438758 (c.4083T > C) (Table 8).