Table 2.

Antigens, mitogens and IL-2

Antigen	Working concentration	Source
GroEL (E. coli HSP60)	10 μg/ml	Bioquote Ltd, York, UK
Human heat shock protein	10 μg/ml	Bioquote Ltd
Yersinia entercolitica lysate	570 μg/ml	Microbiology Department, Queen Elizabeth Hospital, Birmingham, UK
Salmonella typhimurium lysate	300 μg/ml	Microbiology Department, Queen Elizabeth Hospital
Streptolysin O (SLO)	10 μg/ml	Sigma Chemical Co., Poole, UK
Tetanus Toxoid (TT)	10 μg/ml	Statens Serum Institut, Copenhagen, Denmark
IL-2	50 U/ml	EuroCetus BV, Amsterdam, Holland
Phytohaemagglutinin HA15 (PHA)	1 μg/ml	Sigma Chemical Co.

HSP, heat shock protein; IL, interleukin.