Immunogen sequence: CTKFKVSSCR ECIESGPGCT WCQKLNFTGP GDPDSIRCDT RPQLLMRGCA ADDIMDPTSL AETQEDHNGG QKQLSPQKVT LYLRPGQAAA FNVTFRRAKG YPIDLYYLMD LSYSML. CD18, also known as the integrin beta 2 subunit, is a 90-95 kDa type I transmembrane protein expressed on