This subunit of the Mediator complex appears to be conserved only from insects to humans. It is essential for correct retinal development in fish. Subunit composition of the mediator contributes to the control of differentiation in the vertebrate CNS as there are divergent functions of the mediator subunits Crsp34/Med27, Trap100/Med24, and Crsp150/Med14 [2].

1: A unified nomenclature for protein subunits of mediator complexes linking transcriptional regulators to RNA polymerase II. Bourbon HM, Aguilera A, Ansari AZ, Asturias FJ, Berk AJ, Bjorklund S, Blackwell TK, Borggrefe T, Carey M, Carlson M, Conaway JW, Conaway RC, Emmons SW, Fondell JD, Freedman LP, Fukasawa T, Gustafsson CM, Han M, He X, Herman PK, Hinnebusch AG, Holmberg S, Mol Cell. 2004;14:553-557. PMID:15175151

2: Differential roles of transcriptional mediator complex subunits Crsp34/Med27, Crsp150/Med14 and Trap100/Med24 during zebrafish retinal development. Durr K, Holzschuh J, Filippi A, Ettl AK, Ryu S, Shepherd IT, Driever W; Genetics. 2006;174:693-705. PMID:16582438

3: Structure-system correlation identifies a gene regulatory Mediator submodule. Lariviere L, Seizl M, van Wageningen S, Rother S, van de Pasch L, Feldmann H, Strasser K, Hahn S, Holstege FC, Cramer P; Genes Dev. 2008;22:872-877. PMID:18381891