ExplanationFour different loops are observable in the tRNA 3˚ motif. They are the ΨU loop, D loop, variable loop and the anticodon loop. The ΨU loop is named because of the presence of the pseudouridine base. The D loop contains the dihyrdouridine base. The anticodon loop contains the anticodon and the variable loop is named so because its length is variable.
