CUL3 and Gordon syndrome: Lifton’s group, using whole exome sequencing, identified two further genes implicated in Gordon syndrome, KLHL3 (5q31), which encodes Kelch-like 3 (PHA2D), which was also identified by a French group [14], and CUL3 (2q36), which encodes Cullin 3 (PHA2E) [15].