SNORD21, Official Symbol SNORD21provided by HGNC Official Full Name small nucleolar RNA, C/D box 21provided by HGNC Primary source HGNC:HGNC:10144 See related Ensembl:ENSG00000206680 MIM:603635; AllianceGenome:HGNC:10144 Gene type snoRNA RefSeq status REVIEWED Organism Homo sapiens Lineage Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo Also known as U21; RNU21 Summary This gene encodes a small nucleolar RNA (snoRNA) that may be involved in biogenesis of the large (28S) ribosomal subunit. This gene is found within an intron of the RPL5 gene. [provided by RefSeq, Mar 2009]