NCIt definition : Highly conserved cysteine-rich peptides that play a role in host defense, and may
be produced in response to microbial products or proinflammatory cytokines. Defensins
bind to microbial cell membranes and can become aggregate either to form pore-like
structures or to encapsulate the microbe. These peptide aggregates lead to destabilization
of the cell membrane and, subsequently, to lysis of the microbe.;