An integrin alpha with A domain that is a translation product of the human ITGAX gene or a 1:1 ortholog thereof. Integrin alpha-X complexed with beta-2 is a receptor for fibrinogen. It recognizes the sequence GPR in fibrinogen. It mediates cell-cell interaction during inflammatory responses. It is especially important in monocyte adhesion and chemotaxis. [ https://www.uniprot.org/uniprot/P20702 ]