5GQJ:
reference: Crystal Engineering of Self-Assembled Porous Protein Materials in Living Cells., Abe S, Tabe H, Ijiri H, Yamashita K, Hirata K, Atsumi K, Shimoi T, Akai M, Mori H, Kitagawa S, Ueno T, ACS Nano. 2017 Feb 9. doi: 10.1021/acsnano.6b06099. PMID: 28094987

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