An ultra-stable gold-coordinated protein cage displaying reversible assembly by Malay, AD, Miyazaki, N, Biela, A, Chakraborti, S, Majsterkiewicz, K, Stupka, I, Kaplan, CS, Kowalczyk, A, Piette, BMAG, Hochberg, GKA, Wu, D, Wrobel, TP, Fineberg, A, Kushwah, MS, Kelemen, M, Vavpetič, P, Pelicon, P, Kukura, P, Benesch, JLP, Iwasaki, K, Heddle, JG