Summary of data sets.

For each data set, we list the number of protein sequences, the number of amino acids, the number of cross validation folds, and the proportion of amino acids assigned to each label.针对各数据集，我们将列出其中蛋白质序列的数量、氨基酸总数量、交叉验证（cross validation）折数，以及分配至各标签的氨基酸占比。