該基因編碼的蛋白質與小鼠蛋白MCAP（有絲分裂過程中與染色體相關）和人類Ring3蛋白（絲氨酸/蘇氨酸激酶）同源。每一種蛋白質都包含兩個溴域，一個保守的序列基序，可能參與染色質靶向。該基因被認為是T（15；19）易位的19號染色體靶基因（q13；p13.1），它定義了年輕人的上呼吸道癌。已經描述了兩個選擇性剪接轉錄變體。
The protein encoded by this gene is homologous to the murine protein MCAP, which associates with chromosomes during mitosis, and to the human RING3 protein, a serine/threonine kinase. Each of these proteins contains two bromodomains, a conserved sequence motif which may be involved in chromatin targeting. This gene has been implicated as the chromosome 19 target of translocation t(15;19)(q13;p13.1), which defines an upper respiratory tract carcinoma in young people. Two alternatively spliced transcript variants have been described.