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respiratory pigment
res·pi·ra·to·ry pig·ment (plural res·pi·ra·to·ry pig·ments)


noun 
Definition:
 
protein important in respiration: a protein that can bind with oxygen, e.g. hemoglobin
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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