In molecular biology, snoRNA U39 (also known as SNORD39)  is a non-coding RNA (ncRNA) molecule which functions in the modification of other small nuclear RNAs (snRNAs).
SnoRNA U39, also referred to as SNORD39, plays a crucial role in the post-transcriptional modification and regulation of other small nuclear RNAs (snRNAs) within the context of molecular biology.