leumasxl leumasxl

23-03-2017
Biology

contestada

there are twenty standard amino acids that make up all proteins. What four elements are found in all amino acids?

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LorenaBellanger LorenaBellanger

23-03-2017

Hydrogen, oxygen, nitrogen, and carbon

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alicat301 alicat301

23-03-2017

Hydrogen and oxygen..........

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