Expression and activity of 2-5A synthetase in the course of differentiation and apoptosis of PC12 cellsLopp, Annika; Kuusksalu, Anne; Samuel, Külli; Kelve, MerikeCytokine2000 / p. 737-741 Interferon-induced 2',5'-oligoadenylate synthetases versus those from sponges, evolutionarily lowest multicellular animalsKuusksalu, Anne; Lopp, Annika; Päri, Mailis; Reintamm, Tõnu; Kelve, MerikeCytokine2009 / 1/2, p. 85-86 https://www.researchgate.net/publication/247349787_Interferon-induced_2'5'-oligoadenylate_synthetases_versus_those_from_sponges_evolutionarily_lowest_multicellular_animals