Which enzyme catalyzes CO_2 fixation in C_4 p | vedclass

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(B) In $C_4$ plants,the primary $CO_2$ fixation occurs in the mesophyll cells. The enzyme responsible for this initial fixation is $PEP$ carboxylase (

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$PEP$ carboxylase

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(B) In $C_4$ plants,the primary $CO_2$ fixation occurs in the mesophyll cells. The enzyme responsible for this initial fixation is $PEP$ carboxylase (Phosphoenolpyruvate carboxylase). This enzyme catalyzes the reaction between $CO_2$ and $PEP$ (a $3$-carbon compound) to form oxaloacetic acid $(OAA)$,which is a $4$-carbon compound. $RuBP$ carboxylase (Rubisco) is involved in the Calvin cycle within the bundle sheath cells,but the initial fixation in $C_4$ plants is mediated by $PEP$ carboxylase.

Which enzyme catalyzes $CO_2$ fixation in $C_4$ plants?

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