Integral membrane protein present in all neurons and in some non-neural-cell types of vertebrates involved in a cell-signalling pathway controlling interactions between neurons and accessory glial cells in the developing nervous system.

Finance Firm that is the object of takeover by another firm.

Finance Firm's long run dividend to earnings ratio.

Finance Implicit boundaries established by central banks on exchange rates.

Finance Repurchase of stock by a firm of its own stock from a potential bidder.