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. 2019 Aug 3;98(11):6026–6033. doi: 10.3382/ps/pez414

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© The Author(s) 2019. Published by Oxford University Press on behalf of Poultry Science Association.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com.

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Figure 4. — Detection of ALV-B env protein in DF-1/B cells by IFA. (A) No green fluorescence was observed in DF-1 cells, which served as negative controls. (B) Green fluorescence was observed in DF-1/B cells. Magnification is × 100 for (A) and (B).