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—EccDNA counts according to age, breed, and flight activity. (A) Detected eccDNA counts (normalized to spike-in plasmids) according to pigeon age. (B) Normalized eccDNA counts in pigeons from different types of breeds and with different flying behavior. Flying pigeons had flown at least 1,000–1,500 km/year. HP, homing pigeons. ***P < 0.001 Mann–Whitney test.
