FMN2, a novel formin homology protein of the cappuccino subfamily, is highly conserved between evolutionarily diverse vertebrates. FMN2 bears a high degree of similarity to formin-1 which is the founding member of formin homology proteins. FMN2 plays a crucial role in maintenance of the meiotic spindle. The protein is widely expressed in human fetal brain, adult whole brain, hypothalamus, retina, pancreatic islet and germinal-center B cells. Pathological role of the protein is identified in various tumors like parathyloid tumor, glioblastoma, retinoblastoma and chondrosarcoma. FMN2 mutations are often a cause of unexplained infertility in women. The gene encoding for human FMN2 is localized in the chromosomal region 1q43.