 The adjacent gene encodes a small protein of 132 aas and 2 TMSs (TC# 9.B.109.1.1) that could be a holin, based on its size and topology.This protein has the UniProt accession number of S2E3C4.Paralogues are found in this same organism (Candidatus "Nitrosoarchaeum koreensis") and other closely related species.