apical complex

ap·i·cal com·plex

a set of anterior structures that characterize one or several developmental stages of members of the protozoan phylum Apicomplexa; includes the following structures, visible by electron microscopy: polar ring, conoid, rhoptries, micronemes, and subpellicular tubules.
References in periodicals archive ?
They found that two proteins within the apical complex, Pals1 and Pten, were interacting with the Igf1 receptors in the stem cells, relocating the receptors to the boundary between the stem cells and the CSF.
A better understanding of the Igf2 signaling pathway, the stem cell's apical complex proteins that interact with it, and the temporally-driven changes in the CSF could lead to increased understanding of some brain tumors, including glioblastoma.