The amount of a beta-1,3-N-acetylglucosaminyltransferase radical fringe (human) when measured in cerebrospinal fluid. The trait is OBA_2081871 (level of beta-1,3-N-acetylglucosaminyltransferase radical fringe (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid beta-1,3-N-acetylglucosaminyltransferase radical fringe (human) amount.