AASDHPPT and neoplasm: Figure 5 shows position-specific AAC and SSEC for the first and last five amino acids. Positively charged amino acids lysine (K) and arginine (R) are enriched at the C-terminus of ACPs, while nonpolar residues like phenylalanine (F), leucine (L), tryptophan (W), and proline (P) are particularly abundant at the N-terminus. Previous studies [13,53] suggest that the positively charged C-terminus plays a significant role in affecting tumor growth and progression.