1.1.1.116 NAD+ - 1.1.1.116 NAD+ Ara2p is specific for NAD+, while Ara1p utilizes NADP+ 1.1.1.116 NADP+ - 1.1.1.116 NADP+ 66% as effective as NAD+ 1.1.1.116 NADP+ as effective as NAD+