Proteolytic activity and the cysteine protease profile were determined for enzymatic extracts
(EE) from Carica papaya L. cv. Maradol harvest by-products (stems, unripe fruit, petioles and
leaves). The proportion of each by-product type in the sampled plantation was calculated.
Polypeptide bands were identified by SDS–PAGE for each EE and molecular weight
calculated for the cysteine proteases. Leaf and fruit tissue had the highest protein contents of
the by-products. Leaf tissue also produced the highest total EE yield. All the SDS–PAGE …