Glucofructans are long strings of fructose molecules attached to a single glucose molecule. Antibodies are an example of proteins that attach to one specific type of molecule. The electron enters a chlorophyll molecule in Photosystem I. DNA sequencing determines the order of nucleotide bases in a DNA molecule. Akt2 is an important signaling molecule in the insulin signaling pathway. That freed electron is transferred to the primary electron-acceptor molecule, pheophytin. The primary oxygen transporter molecule is hemocyanin. Hemoglobinopathies (genetic defects resulting in abnormal structure of the hemoglobin molecule) may cause both. The synthesis proceeds by utilizing the reactivity of the functional groups in the molecule. DAG is the substrate for the synthesis of phosphatidic acid, a regulatory molecule. A takes an atom from B molecule and terminates. The size of an antibody molecule is about 10 nm. NO is an important cellular signaling molecule. The transition moment is dependent on the physical orientation of the fluorophore molecule. The chemical shift provides information about the structure of the molecule.