FAM9A (Family with Sequence Similarity 9 Member A) is a protein-coding gene that belongs to a family of genes sharing sequence similarity. While its specific functions remain under study and are not yet fully understood, FAM9A is expressed in several tissues, including the brain, testis, and ovaries. This suggests it may play roles in important cellular processes within these organs. Genes in the FAM family often participate in cell signaling, transcription regulation, or protein interactions, though the exact functions of FAM9A continue to be researched.