Patent ID: 7902331
Filing Date: 2011-03-08
Classification: C07K

Abstract:
1. A protein crystalloid body (forisome) isolated from Fabaceae, wherein the protein crystalloid body has a reversible, anisotropic contractability such that: the protein crystalloid body becomes thicker in a direction perpendicular to a longitudinal axis of the protein crystalloid body and shorter along said longitudinal axis when increasing a calcium ion concentration in a medium surrounding the protein crystalloid body past a threshold value of approximately 30 nM and the protein crystalloid body becomes thinner in said perpendicular direction and longer along said longitudinal axis when decreasing the calcium ion concentration below the threshold value of approximately 30 nM; and the protein crystalloid body becomes thicker in said perpendicular direction when increasing a pH value of a medium surrounding the protein crystalloid body to a value above approximately 9.5 without becoming shorter along said longitudinal axis and the protein crystalloid becomes thinner in said perpendicular direction without becoming longer along said longitudinal axis when decreasing the pH value below approximately 9.5; wherein the protein crystalloid body comprises a first protein and a second protein; and wherein, when digesting the first and second proteins by trypsin, a peptide  is found.