the heterotrophic marine dinoflagellate crypthecodinium ( gyrodinium ) cohnii responded negatively ( less tendency to attach ) to epinephrine at concentrations above 5 x 10 ( -15 ) m and to norepinephrine at concentrations above 5 x 10 ( -9 ) m .
C0014563
epinephrine
C0028351
norepinephrine