{"rfam": {"acc": "RF00068", "id": "SNORD21", "description": "Small nucleolar RNA SNORD21", "comment": "U21 is a member of the C/D class of snoRNA which contain the C (UGAUGA) and D (CUGA) box motifs. U21 is encoded within an intron of the gene for ribosomal protein L5 in mammals [1], but within introns of the ADP ribosylation factor gene in Drosophila [2]. U21 snoRNA has a 13 nt region of complementarity with an invariant region of eukaryotic 28S ribosomal RNA.", "curation": {"author": "Griffiths-Jones SR", "seed_source": "Griffiths-Jones SR", "num_seed": 5, "num_full": 566, "num_species": 536, "type": "Gene; snRNA; snoRNA; CD-box;", "structure_source": "Predicted; PFOLD; Griffiths-Jones SR, Daub J"}, "cm": {"build_command": "cmbuild -F CM SEED", "calibrate_command": "cmcalibrate --mpi CM", "search_command": "cmsearch --cpu 4 --verbose --nohmmonly -T 30.64 -Z 2958934 CM SEQDB", "cutoffs": {"gathering": 63.0, "trusted": 63.0, "noise": 62.7}}, "release": {"date": "2026-01-16", "number": "15.1"}, "clan": {"acc": null, "id": null}}}