Complex sentence: CEBPB is capable of increasing the expression of several target genes, among them some have specific role in the nervous system such as the preprotachykinin gene giving rise to substance P and neurokinin A and the choline acetyltransferase responsible for the biosynthesis of the important neurotransmitter acetylcholine.
Split into simpler sentences: CEBPB is capable of increasing the expression of several target genes. Among them, some have specific role in the nervous system such as the preprotachykinin gene, giving rise to substance P and neurokinin A and the choline acetyltransferase responsible for the biosynthesis of the important neurotransmitter acetylcholine.