Anti-DNA G-quadruplex Structures Recombinant Nanobody (SG4) is a recombinant nanobody targeting DNA G-quadruplex Structures (clone SG4). Format: VHH-His (alpaca host). Supplied as a liquid in 0.01M PBS, pH 7.4. Applications: ELISA, EMSA and immunofluorescence. Purity: >95% as determined by SDS-PAGE. For research use only.