title: A closer look at permissive HLA mismatch.
abstract: In this issue of Blood, Pidala et al add a missing piece of information on the impact of amino acid substitutions (AASs) at specific peptide positions of class I antigens.
authors.affiliation: AZIENDA OSPEDALIERA UNIVERSITARIA.
authors.forename: Andrea
authors.initials: A
authors.lastname: Bacigalupo
mesh_terms: D005260:Female; D006086:Graft vs Host Disease / Q000209:etiology*; D018380:Hematopoietic Stem Cell Transplantation / Q000009:adverse effects*; D015395:Histocompatibility Antigens Class I / Q000235:genetics* / Q000378:metabolism*; D006801:Humans; D008297:Male
chemical_list: D015395:Histocompatibility Antigens Class I