Aqueous two-phase systems (PEG/Citrate) applied to purification of protease from Clostridium perfringens - Porto, Tatiana Souza; Pessôa Filho, Pedro de Alcântara; Cavalcanti, Maria Taciana Holanda; Barros Neto, Benício de; Lima Filho, José Luiz de; Porto, Ana Lúcia Figueiredo; Pessoa Junior, Adalberto (International Conference on Biopartitioning and Purification, 2005)