CRYSTAL STRUCTURE OF THE TRIMERIC NECK AND CARBOHYDRATE RECOGNITION DOMAIN OF HUMAN SURFACTANT PROTEIN D IN COMPLEX WITH ALPHA METHYL MANNOSIDE 3G81 SUGAR BINDING PROTEIN, SURFACTANT PROTEIN, CARBOHYDRATE RECOGNITION DOMAIN, CALCIUM, COILED COIL, COLLAGEN, EXTRACELLULAR MATRIX, GASEOUS EXCHANGE, GLYCOPROTEIN, HYDROXYLATION, LECTIN, POLYMORPHISM, SECRETED, SURFACE FILM