title: Human NK cells: SET to kill.
abstract: In this issue of Blood, Trotta et al define a novel mechanism of human granzyme B and perforin regulation and identify 2 new signaling players involved in modulating NK cytotoxicity.
authors.affiliation: Washington University School of Medicine.
authors.forename: Jeffrey W
authors.initials: JW
authors.lastname: Leong
authors.forename: Todd A
authors.initials: TA
authors.lastname: Fehniger