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(a–d) The lowest normal modes (m = 1–4) shapes of 10 aligned proteins from the set of 18; (e–h) the shapes of the corresponding representative SVD vectors 
(m = 1–4); (i–l) the histograms showing the relative probability of the overlap of aligned normal modes (m = 1–4) with their corresponding representative SVD vector 
(m = 1–4). Positions with gaps were not included.
