TAL1 and autosomal recessive primary microcephaly: The STIL (SCL/TAL1 Interrupting Locus previously known as “SIL”) gene encodes a cytosolic and centrosomal protein, which is essential for mouse and zebrafish neuronal embryonic development and is mutated in familial autosomal recessive microcephaly (MCPH)25, 26, 27, 28.