Main article: Nicotinic acetylcholine receptors. The nAChRs are ligand-gated ion channels, and, like other members of the cys-loop ligand-gated ion channel superfamily, are composed of five protein subunits symmetrically arranged like staves around a barrel.
Acrylonitrile butadiene styrene, otherwise known as ABS plastic, is a lightweight material popularly used in children's toys. There are two types: one suited for extrusion molding and one for injection molding. LEGO blocks are made from ABS plastic because it is so light and durable. Continue Reading.
Step 1: Understanding Plastics. There are many different kinds of plastics. Some of them are easier to repair than others. Many plastic parts are made from a plastic called ABS. It is a hard, somewhat brittle plastic and is easily broken. Small pieces with clean breaks can often be super-glued much like reattaching a handle to a tea cup. For larger pieces or for more extensive repair, hot melt adhesive can be used.