chromoprotein

 [kroh-muh-proh-teen, -tee-in]  

chro·mo·pro·tein

   [kroh-muh-proh-teen, -tee-in]
noun Biochemistry.
a protein, as hemoglobin or rhodopsin, containing a pigmented nonprotein group, such as heme, riboflavin, or retinal.
Origin:
1920–25; chromo- + protein
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Chromoprotein is always a great word to know.
So is gallium. Does it mean:
Symbol: Xe; atomic weight: 131.30; atomic number: 54
Symbol: Ga; atomic weight: 69.72; atomic number: 31
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Collins
World English Dictionary
chromoprotein (ˌkrəʊməʊˈprəʊtiːn)
 
—n
any of a group of conjugated proteins, such as haemoglobin, in which the protein is joined to a coloured compound, such as a metal-containing porphyrin

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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