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. Author manuscript; available in PMC: 2020 Nov 1.
Published in final edited form as: Virology. 2019 Sep 3;537:186–197. doi: 10.1016/j.virol.2019.09.001

Figure 5. Inner capsid difference peaks of PCV2a, PCV2b and PCV2d.

Figure 5.

Comparing the difference peaks in the inner capsid of PCV2a (A), PCV2b (B) and PCV2d (C) reveals a conserved location for the tetranucleotide molecular envelope (green) and differences for the N-termini molecular envelope (blue). The orientation of the PCV2b and PCV2d N-termini are conserved; however, the N-termini of the PCV2a are rotated ~90° clockwise. The icosahedral symmetry elements are shown using the same convention as Fig. 4B. The molecular envelopes for a single subunit (one of sixty) are painted with bold colors. D) Radial plots of PCV2a (blue, EMDB 6555), PCV2b (black, EMDB 8939), PCV2d (red, EMDB 20113), and PCV2 expressed in E. coli (light blue, EMDB 6746). The plots are normalized and scaled to one another to simplify the comparison. The PCV2d molecular envelope possesses the greatest amount of content within its capsid, while the PCV2a molecular envelope possesses the least amount of content within its capsid.