Immunogen sequence: AWTTSSLACA QGPEFWCQSL EQALQCRALG HCLQEVWGHV GADDLCQECE DIVHILNKMA KEAIFQDTMR KFLEQECNVL PLKLLMPQCN QVLDDYFP. Pulmonary surfactant is a complex mixture of phospholipids and proteins that is secreted from type II cells in alveoli and re