Formation of uroporphyrin from porphobilinogen by the heart-body tissue and coelomocytes of the polychaete Neoamphitrite figulus

Abstract
Suspensions of heart-body tissue and of coelomocytes in solutions of porphobilinogen produced uroporphyrin. This affords additional evidence for the haematopoietic function of the heart-body, and for the view that the free porphyrins found there and in the haemoglobin-containing coelomocytes are formed by these tissues' own activity in haem synthesis.