Ethidium bromide intercalates and stains DNA, providing a fluorescent red-orange stain. Actinomycin is a complex molecule that intercalates DNA and prevents RNA synthesis. One famous intercalation host is graphite, which intercalates potassium as a guest. Hycanthone is shown to intercalates into DNA and inhibit RNA synthesis "in vitro". This molecule (dye) intercalates among the lipophilic part of biological membranes. Potassium intercalates into graphite to give a variety of compounds, including KC8. On binding to DNA, daunomycin intercalates, with its daunosamine residue directed toward the minor groove. Penta-iodide intercalates between the starch molecules and stains amylose and amylopectin blue and red, respectively. During the charging process, <chem>AlCl4-</chem> ions intercalates among the graphene stacked layers. A longer dance segment intercalates with all the scenes during the whole video. Congo red dye intercalates between the folds and, when observed under polarized light, causes birefringence. Topotecan's active lactone form intercalates between DNA bases in the topoisomerase-I cleavage complex.