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Ribulose-phosphate 3-epimerase (EC 18.104.22.168) (also known as pentose-5-phosphate
3-epimerase or PPE) is the enzyme that converts D-ribulose 5-phosphate into
D-xylulose 5-phosphate in Calvin's reductive pentose phosphate cycle. In
Alcaligenes eutrophus two copies of the gene coding for PPE are known ,
one is chromosomally encoded (cbbEC), the other one is on a plasmid (cbbeP).
PPE has been found in a wide range of organisms from all kingdoms of life. The
sequence of PPE is highly related to:
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