The Primary Acceptor of CO2
- The accepter molecule is a 5-carbon ketose sugar, which is ribulose bisphosphate (RuBP).
- Since the first product was a C3 acid, the primary acceptor would be a 2-carbon compound.
- Scientists spent many years trying to identify a 2-carbon compound before they discovered the 5-carbon RuBP.
Fig. Ribulose bisphosphate