P3O1R1P3H4Y4R1I1N1S1
20 points
PORPHYRINS is validvalid
PORPHYRIN,
PORPHYRIN, any of a large group of red or purple crystalline pigments present in plant and animal tissues
PORPHYRIN,
PORPHYRIN, any of a large group of red or purple crystalline pigments present in plant and animal tissues