Figure 1.

CD measurements on all the GQ constructs studied at 150 mM K⁺ and 2 mM Mg²⁺. (A) L2–L5 constructs. (B) O1–O5 constructs. Data on O1 and O2 are consistent with parallel GQs, whereas that on L2, O4, and O5 are consistent with antiparallel GQ conformations. Data on L3–L5 have signatures of both parallel and antiparallel GQ (the hybrid conformation).