Insect-immune protein with antimicrobial activity (PubMed:16731347). Forms a protein complex at the bacterial surface. Can inhibit hemocyte aggregation. Hemolymph. Expressed in fat body of fifth instar larvae after bacterial challenge (PubMed:12706633, PubMed:16731347). Expressed in naive 2 h (precellular blastoderm stage) and 24 h (predorsal closure stage) eggs (PubMed:14728663). By bacterial infection. Silencing by small interfering RNA (siRNA) leads to reduced protective effect conferred by non-pathogenic E.coli infection prior the subsequent infection by lethal and highly virulent pathogen Photorhabdus luminescens TT01. Speeds the rate at which insects die after the pathogen infection. Belongs to the hemolin family.