1 To obtain hemoglobin, a pressure of E. coli bacteria that has the flexibility to supply human hemoglobin is used. Synthetic hemoglobin-based merchandise are produced from hemoglobin harvested from an E. coli micro organism strain. There are 20 naturally occurring amino acids supplier Europe acids that may be used to supply hemoglobin. There are two significantly different merchandise that are underneath improvement as blood substitutes. There are also problems with the stability of hemoglobin in an answer. Unlike PFC products where dissolving is the key mechanism, oxygen covalently bonds to hemoglobin.