Component of the eukaryotic translation initiation factor 3 (eIF-3) complex, which is involved in protein synthesis of a specialized repertoire of mRNAs and, together with other initiation factors, stimulates binding of mRNA and methionyl-tRNAi to the 40S ribosome. The eIF-3 complex specifically targets and initiates translation of a subset of mRNAs involved in cell proliferation. Component of the eukaryotic translation initiation factor 3 (eIF-3) complex, which is composed of 13 subunits: eif3a, eif3b, eif3c, eif3d, eif3e, eif3f, eif3g, eif3h, eif3i, eif3j, eif3k, eif3l and eif3m. Belongs to the eIF-3 subunit H family.