two neuroblastoma cell lines were cultured in control ( euthyroid ) and hypothyroid media and examined for protein , rna and dna content , activity of the catecholaminergic enzymes tyrosine hydroxylase ( th , ec 1.14.16.2 ) and monoamine oxidase-a ( mao-a , ec 1.4.3.4 ) , and for l-triiodothyronine ( t3 ) nuclear receptors .
C0020676
hypothyroid
C0041014
triiodothyronine