This fungal specific cysteine rich domain is found in some proteins with proposed roles in fungal pathogenesis [1]. The structure of the CFEM domain containing protein 'Surface antigen protein 2' from Candida albicans (Swiss:Q5A0X8) has been solved [2].

1: An eight-cysteine-containing CFEM domain unique to a group of fungal membrane proteins. Kulkarni RD, Kelkar HS, Dean RA; Trends Biochem Sci 2003;28:118-121. PMID:12633989

2: Structural basis of haem-iron acquisition by fungal pathogens. Nasser L, Weissman Z, Pinsky M, Amartely H, Dvir H, Kornitzer D; Nat Microbiol. 2016;1:16156. PMID:27617569