Z12 small nucleolar RNA is a non-coding RNA (ncRNA) molecule which functions in the modification of other small nuclear RNAs (snRNAs). This type of modifiying RNA is usually located in the nucleolus of the eukaryotic cell which is a major site of snRNA biogenesis. It is known as a small nucleolar RNA (snoRNA) and also often referred to as a guide RNA. Z12 snoRNA 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). Most of the members of the box C/D family function in directing site-specific 2'-O-methylation of substrate RNAs.
Famous quotes containing the word small:
““The wind doth blow today, my love,”
And a few small drops of rain;
I never had but one true love,
In cold grave she was lain.”
—Unknown. The Unquiet Grave (l. 1–4)