CSPGs may also form barriers around NSCs and regulate proliferation, differentiation and apoptotic signals to maintain the NSC state.
Thus, BAR superfamily proteins may form diffusion barriers in smaller scale structures compared to septins, which are membrane-associated proteins that form diffusion barriers, for example, at the primary cilia and at the neck of budding yeast cells (Saarikangas and Barral, 2011).
However, at present, we do not know the exact spatial scale of genetic clusters nor what environmental features may form the barriers between them.
According to the International Classification of Functioning, Disability and Health (ICF), strategies may form both barriers and facilitators to successful participation of people with a disability, depending on a range of other factors (World Health Organization, 2001).
As a third and related reason for reduced dispersal, Cape Blanco is a geographical headland along the coast, and such promontories are known to cause retention zones that entrain rockfish larvae and may form discrete barriers to gene flow (Morgan and Botsford 1998; Wing et al. 1998).
These areas may form a barrier region (velocity-strengthening behavior), and the barriers may cause the rupture velocities to be slow.
[26] warns that a large group discussion may form a barrier to achieving consensus.
Surface drifters released from Oregon tend to veer offshore at this point [30]: strong upwelling jets and seasonal offshore currents [39], [40] may form a barrier that has a structuring effect on some marine populations in this area.
Furthermore, it has been suggested that the presence of Tm before transplantation may form a barrier to the induction of tolerance [ 10, 13, 18, 19].
