Extraction of fibrinolytic proteases from Streptomyces sp. DPUA1576 using PEG-phosphate aqueous two-phase systems - Silva, Germana Michelle de Medeiros e; Marques, Daniela de Araújo Viana; Porto, Tatiana Souza; Lima Filho, José Luiz; Teixeira, José Antonio Couto; Pessoa Junior, Adalberto; Porto, Ana Lúcia Figueiredo (Fluid Phase Equilibria, 2013)