Column chart distribution of Apoptosis Inducing Anti-Cancer Peptides based on charge. 555 peptides (~ 67.8%) have net charge between +1 and -1. The charge is calculated as Na + Nb (Na: Number of acidic amino acid residues, Nb: Number of basic amino acid residues) Each acidic amino acid residues are assigned a value of -1, basic amino acid residues are assigned a value of 1 and neutral amino acid residues are assigned a value of 0.