Nucleic acids rich in guanine are able to fold into unique structures known as G-quadruplexes. G-quadruplexes consist of four tracts of guanylates arranged in parallel or antiparallel strands that are aligned in stacked G-quartet planes. The structure is further stabilized by Hoogsteen hydrogen bonds and monovalent cations centered between the planes. https://www.markbroyard.com/mega-offer-maybelline-fit-me-fdn-matte-pore-355-coconut-for-sale-top-super/