Carbon fixation in C4 plants. This process is called the C4 pathway because the first molecule formed, oxaloacetate, contains four carbons. The oxaloacetate is converted to malate, which moves into bundle sheath cells 45 Indoor Plants That'll Add Life and Color to Your Interiors The 5 Monstera Growth Stages Lifecycle Explained 10 Flowering Houseplants for Sunny Spots That Thrive in a Sunny Window