induces immune profile E. coli LT toxin derived vaccine adjuvant LTK63 vaccine mutant PMID:10790422 LTK63 Vaccine Mutant Adjuvant vaccine adjuvant An E. coli LT toxin derived vaccine adjuvant that is a mutant form of LT containing a Ser-Lys substitution in position 63 which has been shown to be totally devoid of toxicity stable to protease treatment and able to act as mucosal adjuvant. PMID:9607006 LTK63 is an enzymatically inactive mutant of the heat-labile enterotoxin of Escherichia coli. It can be used as a potent mucosal adjuvant. Samantha G. Sayers PMID:17920733 https://violinet.org/vaxjo/vaxjo_detail.php?c_vaxjo_id=19 Th2/Th17 mixed immune profile