Erytech Pharma SA, also known as ERYTECH Pharma, is a France-based biopharmaceutical company developing medicinal products mainly in oncology, hematology and immunology fields of business. The Company offers ESY-ASP (GRASPA), a medicinal product consisting of L-Asparaginase entrapped into human homologous red blood cells. The product is used for treatment of Acute Lymphoblastic Leukemia (ALL), a childhood cancer. The Company's technology is based on the use of human red blood cells (RBCs) to improve the pharmacokinetic (PK) and pharmacodynamic (PD) properties of therapeutic enzymes, for instance asparaginase. The enzyme can destroy asparagine and deprive cancer cells of an important nutrient for these cells, resulting in their death.