This domain is found in Arabidopsis thaliana proteins, which are specifically expressed during meiosis [1]. Many of these members contain a repeated region.

1: Analysis of Arabidopsis floral transcriptome: detection of new florally expressed genes and expansion of Brassicaceae-specific gene families. Zhang L, Wang L, Yang Y, Cui J, Chang F, Wang Y, Ma H; Front Plant Sci. 2015;5:802. PMID:25653662