Abstract
The coiled threads and filaments described by Gross as essential components of elastin, liberated from the tissue by tryptic digestion, and later described by Franchi and De Robertis as products of tryptically digested bacterial flagellae were demonstrated to be present in Armour''s crystalline trypsin, but not in the more highly purified product "Tryptar," and could be produced by incubation from clear, sterile solns. of crystalline trypsinogen. This process probably represented a fibrous transformation of trypsinogen, a component or contaminant thereof.

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