Arc-type ribbon-helix-helix <p>This entry represents a domain with a ribbon-helix-helix topology consisting of four helices in an open array of two hairpins. This domain is found in Mnt and Arc, two structurally homologous repressors encoded by bacteriophage P22 [<cite idref="PUB00014001"/>, <cite idref="PUB00017238"/>].</p>