The protein encoded by this gene belongs to the kelch repeat-containing family, and contains an N-terminal BTB/POZ domain a BACK domain and six C-terminal kelch repeats. Kelch domains are thought to form a four stranded beta-sheet blade structure that can fold into a beta-propeller domain when multiple kelch repeats are found together. Mutations in this gene have been associated with oligozoospermia in some infertile males. [provided by RefSeq, Jul 2016].