Summary
Rabbit fibrinogen digest products (FDP) have been separated by Pevikon block electrophoresis
yielding fragments D, E and other unidentified FDP.
The fragments were injected into rabbits. Surprisingly, as little as 4.3 mg of fragment
D elicited a significant increase in plasma fibrinogen concentration 24 hr after injection.
The stimulating activity of fragment D is at least 10-fold higher than that of fragment
E.