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. 2022 Apr 18;33(4):503–512. doi: 10.3233/CBM-210198

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© 2022 – The authors. Published by IOS Press.

This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial (CC BY-NC 4.0) License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 1. — Amino acid sequences of apolipoprotein A2 (apoA2) homodimers and several isoforms of apoA2-isoforms (apoA2-i) [12]. Apolipoprotein A2 (apoA2) is comprised of 77 amino acids and forms a homodimer via disulfide bonds. The circulating ApoA2-isoforms (apoA2-i) in the bloodstream consist of 5 isoforms that have different C-terminal amino acids. We named them apoA2-ATQ/ATQ (17,380 Da), apoA2-ATQ/AT (17252 Da), apoA2-AT/AT (17,124 Da), apoA2-AT/A (17, 023 Da), and apoA2-A/A (16,922 Da). ApoA2-ATQ/ATQ, -ATQ/AT, and -AT/AT are observed in healthy controls. In contrast, apoA2-AT/A and -A/A are observed only in pancreatic adenocarcinoma (PDAC).