Tyrosine Microcrystals Produced by Digestion of Proteins with Pancreatic Enzymes

If serum albumin from several animals, including humans, at concentrations greater than about 60 mg/mL is combined with an aqueous extract of porcine or human pancreas, then massive amounts of microcrystals develop. Both raw blood serum, as well as a range of concentrated, pure proteins, when combined with the extract produced identical crystals. Morphologies of crystals and their aggregates did, however, show some dependence on the starting...