To avoid having a prohibitively small percentage of experimentally-verified AMPs in the dataset and to match the sizes of datasets used in previous experiments with similar architectures, we subsampled 10% of the 3 million unreviewed datapoints of Uniprot and selected 268,195 to form an additional set of datapoints. Subsampling was done at random, subject to the constraint of retaining a roughly equal number of peptide sequences of each length to ameliorate the extent to which the models focused on this aspect, though there are fewer very short sequences due combinatoric constraints (Fig. ).