单语范例（未经PONS编辑处理）
These different progenitor domains are established by communication between different classes of homeobox transcription factors.
en.wikipedia.org Homeobox genes code for homeodomain proteins in both vertebrates and invertebrates.
en.wikipedia.org This gene belongs to the homeobox family of genes.
en.wikipedia.org Homeobox genes are a group of transcription factors characterized by a homeodomain that initiates gene expression which regulates cell differentiation and development when it binds to a target promoter.
en.wikipedia.org Molecular-genetic analysis of craniates reveals that, compared to less complex animals, they developed duplicate sets of many gene families that are involved in cell signaling, transcription, and morphogenesis (see homeobox).
en.wikipedia.org