Complex sentence: Cholinergic receptor, nicotinic, alpha 6, also known as CHRNA6, is a human gene, which codes for the α6 subunit found in certain types of nicotinic acetylcholine receptors found primarily in the brain.
Split into simpler sentences: Cholinergic receptor, nicotinic, alpha 6, also known as nAChRα6, is a protein that in humans is encoded by the "CHRNA6" gene. The CHRNA6 gene codes for the α6 nicotinic receptor subunit that is found in certain types of nicotinic acetylcholine receptors found primarily in the brain.