Antibacterial peptide mostly active against Gram-positive bacteria (PubMed:20605792). It acts by selectively inhibiting peptidoglycan biosynthesis through complex formation with the cell wall precursor lipid II (1:1 molar ratio) thus inhibiting cell wall synthesis (PubMed:20605792). It does not disrupt cell membranes (PubMed:20605792). Is noticeably less potent than Cg-Defh2 and Cg-Defm (PubMed:20605792). Shows no or limited activities against Gram-negative bacteria (PubMed:20605792). Expressed in hemocytes. Has the structural arrangement of an alpha-helix connected to a beta-sheet by disulfide bonds (CSalpha/beta). Belongs to the invertebrate defensin family.