This motif is found in the Yaf2 and RYBP proteins that are homologous parts of the PRC1 complex. This motif forms a beta hairpin structure when it binds to the RAWUL domain Pfam:PF16207.

1: Polycomb group targeting through different binding partners of RING1B C-terminal domain. Wang R, Taylor AB, Leal BZ, Chadwell LV, Ilangovan U, Robinson AK, Schirf V, Hart PJ, Lafer EM, Demeler B, Hinck AP, McEwen DG, Kim CA; Structure. 2010;18:966-975. PMID:20696397