Title:Estudio preliminar de "Macrodontina", una nueva cisteinilproteinasa aislada de frutos de Pseudananas macrodontes (Morr.) Harms (Bromeliaceae) / Preliminary study of "Macrodontin", a new cysteinilproteinase isolated from fruits of Pseudonanas macrodontes (Morr.) Harms (Bromeliaceae)