6jjh B 14 1.74 URS0001A16A80_101947 32453431 101947 ggcucggcggcgga .............. .............. Crystal structure of a two-quartet RNA parallel G-quadruplex complexed with the porphyrin TMPyP4; RNA (5'-R(*GP*GP*CP*UP*CP*GP*GP*CP*GP*GP*CP*GP*GP*A)-3') 6jji B 14 3.1 URS0001A16A80_101947 32453431 101947 ggcucggcggcgga .............. .............. Crystal structure of a two-quartet RNA parallel G-quadruplex complexed with the porphyrin TMPyP4 (1:1); RNA (5'-R(*GP*GP*CP*UP*CP*GP*GP*CP*GP*GP*CP*GP*GP*A)-3')