snoRNA snR57 belongs to the C/D box class of snoRNAs which contain the conserved sequence motifs known as the C box (UGAUGA) and the D box (CUGA).
snoRNA snR57 is classified within the C/D box class of snoRNAs that feature distinctive sequence patterns like the C motif (UGAUGA) and the D motif (CUGA), which are common to this group.