The amount of a bifunctional heparan sulfate N-deacetylase/N-sulfotransferase 1 (human) when measured in cerebrospinal fluid. The trait is OBA_2058092 (level of bifunctional heparan sulfate N-deacetylase/N-sulfotransferase 1 (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid bifunctional heparan sulfate N-deacetylase/N-sulfotransferase 1 (human) amount.