FAM9A (Family with Sequence Similarity 9 Member A) is a protein-coding gene that belongs to a group of genes sharing sequence similarity. Although its specific functions are still being studied and are not completely understood, FAM9A is expressed in several tissues, including the brain, testis, and ovaries. This indicates it may have roles in vital cellular processes within these organs. Genes in the FAM family often participate in cell signaling, transcription regulation, or protein interactions, but the precise functions of FAM9A are still under investigation.