A NlpC/P60 dipeptidyl-peptidase (LytFM) was found in Sarcopteformes mites.
The mite proteins are monophyletic, sharing an ancestor with actinomycetes and ascomycetes.
D. pteronyssinus lytFM is polymorphic and intronless in contrast to the gene in D. farinae.
Mite LytFM homologues are single domain proteins.
Possible lateral lytFM transfer between mites and their bacterial endosymbionts.