This family consists of Ribulose-phosphate 3-epimerase, also known as pentose-5-phosphate 3-epimerase (PPE). PPE converts D-ribulose 5-phosphate into D-xylulose 5-phosphate in Calvin's reductive pentose phosphate cycle. It has been found in a wide range of bacteria, archebacteria, fungi and plants. [Energy metabolism, Pentose phosphate pathway]
Jiyao W et al.(2023). "The conserved domain database in 2023.",