Component of the Mediator complex, a coactivator involved in regulated gene transcription of nearly all RNA polymerase II-dependent genes. Mediator functions as a bridge to convey information from gene-specific regulatory proteins to the basal RNA polymerase II transcription machinery. Mediator is recruited to promoters by direct interactions with regulatory proteins and serves as a scaffold for the assembly of a functional preinitiation complex with RNA polymerase II and the general transcription factors (By similarity). Component of the Mediator complex. Belongs to the Mediator complex subunit 13 family. This sequence is encoded by a gene on chromosome 15 and is unlikely to be the med13 ortholog because it shows similarity but not synteny with human MED13. The chromosome 10 med13 gene identified by PubMed:17208216 is distinct from this entry.