{ "prompt": "A detailed s

{ "prompt": "A detailed scientific schematic of a DNA tetrahedron with internal bulge modification for folic acid (FA) attachment. The tetrahedron is formed by four DNA strands (A, B, C, D). On one edge, a bulge of three thymine (T) bases is shown protruding from the double helix. The bulge carries a chemical modification (NH2 or DBCO). Folic acid molecules (FA-PEG-N3 or FA-PEG-NH2) are covalently linked to the bulge via click chemistry (DBCO-Azide) or EDC/NHS amide coupling. Labels indicate DNA strands, bulge, chemical modification, folic acid molecules, and covalent bonds. The diagram is professional, research-oriented, and clear.", "size": "1024x1024" }