Capillary bioreactors based on human purine nucleoside phosphorylase: a new approach for ligands identification and characterization - Moraes, Marcela Cristina de; Ducati, Rodrigo Gay; Donato, Augusto José; Basso, Luiz Augusto; Santos, Diógenes Santiago; Cardoso, Carmen Lúcia; Cass, Quezia Bezerra (Journal of Chromatography A, 2012)