Based on limited published evidence, RBMY1F is an RNA-binding protein located on the Y chromosome Y in spermatogenesis. UniProt annotations indicate it participates in RNA binding and pre-mRNA splicing via the spliceosome in testis tissue, with roles in sperm development. GO terms support functions in mRNA binding, spliceosomal complex assembly, and protein binding. Clinical relevance is suggested by identification within a minimal critical region of AZFc deletions associated with testicular maturation arrest and male infertility 1.