level of guanine nucleotide-binding protein G(s) subunit alpha isoforms Gnas-1/Gnas-2/3/4 (human) in cerebrospinal fluid (OBA_2081951) is the amount of a guanine nucleotide-binding protein G(s) subunit alpha isoforms Gnas-1/Gnas-2/3/4 (human) when measured in cerebrospinal fluid. Also known as: cerebrospinal fluid guanine nucleotide-binding protein G(s) subunit alpha isoforms Gnas-1/Gnas-2/3/4 (human) amount.