What is needed to convert PGA into G3P?

To convert 3-phosphoglycerate (PGA) into glyceraldehyde-3-phosphate (G3P), ATP and NADPH are required. ATP provides the energy to phosphorylate PGA, while NADPH acts as a reducing agent to convert the phosphorylated compound into G3P through the reduction process. This conversion occurs during the Calvin cycle in photosynthesis.