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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
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physical entity go
an entity that has physical existence
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thing go
a separate and self-contained entity
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unit, building block go
a single undivided natural thing occurring in the composition of something else
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molecule go
(physics and chemistry) the simplest structural unit of an element or compound
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macromolecule, supermolecule go
any very large complex molecule
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protein go
any of a large group of nitrogenous organic compounds that are essential constituents of living cells
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conjugated protein, compound protein go
a protein complex combining amino acids with other substances
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hemoprotein, haemoprotein go
a conjugated protein linked to a compound of iron and porphyrin
hemoglobin, haemoglobin, Hb
a hemoprotein composed of globin and heme that gives red blood cells their characteristic color
noun.substance

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