title: Antioxidant and chelating activity of Jatropha curcas L. protein hydrolysates.
abstract: BACKGROUND
  Antioxidant and chelating activities were determined in protein hydrolysates that were produced by treating a protein isolate of a non-toxic genotype of Jatropha curcas with the protease preparation alcalase.
  
  
  RESULTS
  50 min protein hydrolysate with a degree of hydrolysis of 31.7% showed highest antioxidant and chelating activity. These activities were also determined in six peptidic fractions that were separated by gel filtration chromatography of the 50 min hydrolysate. The lower-molecular-weight peptidic fractions had the highest antioxidant and chelating activities, which correlated with a higher content in antioxidant and chelating amino acids such as tyrosine and histidine.
  
  
  CONCLUSIONS
  Results show that J. curcas represents a good source of bioactive peptides. This may be important for the revalorization of defatted J. curcas flour, a by-product resulting form oil extraction for biodiesel production. This is especially important in Third World and developing countries such as Mexico.
authors: Centro de Desarrollo de Productos Bióticos del Instituto Politécnico Nacional, Yautepec, Morelos, Mexico.
authors: Santiago
authors: S
authors: Gallegos-Tintoré
authors: Cristina
authors: C
authors: Torres-Fuentes
authors: Alma Leticia
authors: AL
authors: Martínez-Ayala
authors: Javier
authors: J
authors: Solorza-Feria
authors: Manuel
authors: M
authors: Alaiz
authors: Julio
authors: J
authors: Girón-Calle
authors: Javier
authors: J
authors: Vioque
mesh_terms: D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology*; D002614:Chelating Agents / Q000302:isolation & purification / Q000494:pharmacology*; D006868:Hydrolysis; D031286:Jatropha / Q000737:chemistry*; D010455:Peptides / Q000302:isolation & purification / Q000494:pharmacology*; D010940:Plant Proteins / Q000302:isolation & purification / Q000494:pharmacology*; D011492:Protein Hydrolysates / Q000302:isolation & purification / Q000494:pharmacology*; D012639:Seeds; D013381:Subtilisins / Q000378:metabolism
chemical_list: D000975:Antioxidants; D002614:Chelating Agents; D010455:Peptides; D010940:Plant Proteins; D011492:Protein Hydrolysates; D013381:Subtilisins