Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Protoporphyrin" Definition
noun
A metal-free porphyrin, C32H32N4(COOH)2, that combines with ferrous iron to form the heme group in hemoglobin and myoglobin, and with ferric iron to form the hemin group in catalase and some cytochromes.
Source: American Heritage Dictionary
A purple porphyrin acid CHNO obtained from hemin or heme by removal of bound iron.
Source: Merriam-Webster
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