Binds to lipopolysaccharide from a variety of Gram-negative bacteria and to lipid A. Hemolymph (at protein level). Constitutively expressed mainly in fat body and also in hemocytes and secreted into hemolymph. Not detected in midgut, epidermis, or Malpighian tubule of naive larvae. Not induced in larvae following injection with microorganisms. N-glycosylated. Belongs to the NPC2 family.