Guanine tetrad
= Guanine tetrad
{wiki=Guanine_tetrad}
A guanine tetrad, also known as a G-tetrad, is a specific structural motif formed by the interaction of four guanine (G) nucleobases in nucleic acids, primarily DNA or RNA. In this arrangement, four guanine bases come together to form a planar, square-shaped structure stabilized by hydrogen bonding and Hoogsteen base pairing.