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A human chemosensory modality to detect peptides in the nose?

Milinski et al . [[1][1]] report human individuals perceiving their body odour as self-like if it is enriched with around 1 nanomol per armpit of a synthetic peptide that is a known ligand of one of the subject's own human leukocyte antigen (HLA) alleles. At the same time, they report specific brain