TB11Cs2H1 is a member of the H/ACA-like class of non-coding RNA (ncRNA) molecules that guide the sites of modification of uridines to pseudouridines of substrate RNAs.

U107 has a predicted hairpin-hinge-hairpin-tail structure and is predicted to be a member of the H/ACA box class of snoRNAs that guide the sites of modification of uridines to pseudouridines.

It is a member of the H/ACA class of small nucleolar RNA that guide the sites of modification of uridines to pseudouridines.

ACA66 (SCARNA20) is a member of the H/ACA box class of snoRNAs that guide the sites of modification of uridines to pseudouridines.

U98 belongs to the H/ACA box class of snoRNAs which are thought to guide the sites of modification of uridines to pseudouridines, the target for this family is unknown.

M1 is a predicted to belong to the H/ACA box class of snoRNAs which are thought to guide the sites of modification of uridines to pseudouridines.

This class is thought to guide the sites of modification of uridines to pseudouridines by forming direct base pairing interactions with substrate RNAs.