Phosphoserine Aminotransferase Deficiency, Infantile/juvenile Form, is also known as psat deficiency, infantile/juvenile form. An important gene associated with Phosphoserine Aminotransferase Deficiency, Infantile/juvenile Form is PSAT1 (Phosphoserine Aminotransferase 1). Affiliated tissues include eye and skin, and related phenotypes are feeding difficulties in infancy and failure to thrive in infancy