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AYn1/AYp28 peptides mainly targets lung and small intestine tissues hACE2 mice after intranasal administration. Ten days after intranasal administration of biotin-labeled peptides, the distribution of AYn1 and AYp28 peptides were examined by IHC using anti-biotin antibody. Our data indicated that 10 days after intranasal administration, peptides preferentially distributed in the lungs and intestine, but not in the kidneys and livers.
