%0 Journal Article %T Mediator Subunit 12 Is Required for Neutrophil Development in Zebrafish %A Maria-Cristina Keightley %A Judith E. Layton %A John W. Hayman %A Joan K. Heath %A Graham J. Lieschke %J PLOS ONE %D 2011 %I Public Library of Science (PLoS) %R 10.1371/journal.pone.0023845 %X Hematopoiesis requires the spatiotemporal organization of regulatory factors to successfully orchestrate diverse lineage specificity from stem and progenitor cells. Med12 is a regulatory component of the large Mediator complex that enables contact between the general RNA polymerase II transcriptional machinery and enhancer bound regulatory factors. We have identified a new zebrafish med12 allele, syr, with a single missense mutation causing a valine to aspartic acid change at position 1046. Syr shows defects in hematopoiesis, which predominantly affect the myeloid lineage. Syr has identified a hematopoietic cell-specific requirement for Med12, suggesting a new role for this transcriptional regulator. %U http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0023845