ROTATIONALLY SEQUESTERED TRANSLATORS

1 . A composition comprising a first and a second nucleic complexes, wherein:

the first complex comprises a first, a second, a third and a fourth nucleic acid strands each comprising, sequentially, a first, a second and a third fragments and defined as B-X-D, C - X -Ā, D - Z -Ī and J-Z-C, respectively, wherein each letter denotes a fragment and each string of letters connected by “-” denotes a strand, and wherein the first complex comprises a first duplex region (X:: X ) formed between the second fragments of the first and second strands, a second duplex region ( Z ::Z) formed between the second fragments of the third and fourth strands, a third duplex region (D:: D ) formed between the third fragment of the first strand and the first fragment of the third strand, and fourth duplex region ( C ::C) formed between the first fragment of the second strand and the third fragment of the fourth strand; and

the second complex comprises a first and second nucleic acid strands each comprising, sequentially, a first, a second and a third fragment and defined as F-Y-D and C - Y -Ē, respectively, and a third nucleic acid comprising, sequentially, a first and a second fragment and defined as D -C, wherein the second complex comprises a first duplex region (Y:: Y ) formed between the second fragments of the first and second strand, a second duplex region (D:: D ) formed between the third fragment of the first strand and the first fragment of the third strand, and a third duplex region ( C ::C) formed between the first fragment of the second strand and the second fragment of the third strand;

wherein the first fragment (B) of the first strand of the first complex, the third fragment (Ā) of the second strand of the first complex, the third fragment (Ī) of the third strand of the first complex, the first fragment (J) of the fourth strand of the first complex, the first fragment (F) of the first strand of the second complex, and the third fragment (Ē) of the second strand of the second complex are single-stranded;

and wherein:

the third strand ( D -C) of the second complex and the combination of the first fragment ( D ) of the third strand of the first complex and the third fragment (C) of the fourth strand of the first complex, sequentially, have sequence identity to allow their binding to a same target nucleic acid sequence.

2 . The composition of claim 1 , wherein each fragment is from about 5 bases to about 50 bases long.

3 . The composition of claim 1 , wherein each fragment that is single-stranded is from about 5 bases to about 30 bases long.

4 . The composition of claim 1 , further comprising a pharmaceutically acceptable carrier.

5 . A cell comprising the composition of claim 1 .