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C. gigantea and cardenolide metabolites. (A) C. gigantea plant. (B) Plant tissues used for RNA-sequencing libraries. 1, closed bud 2; sepals and petals; 3, peduncle and pedicel; 4, young leaf; and 5, gynostegium. (C) Mature leaf tissue used for RNA-sequencing libraries. (D) Cardenolide metabolite with the carbons numbered. Rx and Ry indicate ambiguity of the attached groups, which vary depending on the specific cardenolide.
