Table 2.

Location of main endogenous enzymes in somatic cells

Type of enzymes	Type of somatic cells
	Macrophages	PMNs	Lymphocytes	Epithelial cells	Cell type unknown
Proteases
Cathepsin B	+ Guha and Padh (2008)	+ Baggiolini et al. (1978); Magboul et al. (2001); Travis and Fritz (1991)		+ Lah et al. (1996); Guha and Padh (2008)
Cathepsin C		+ Travis and Fritz (1991)
Cathepsin D	+ Cohn (1975); Diment et al. (1988); Guha and Padh (2008)	+ Baggiolini et al. (1978); Cohn (1975); Owen and Campbell (1999)		+ Cohn (1975); Lah et al. (1996); Lkhider et al. (2004); Seol et al. (2006); Guha and Padh (2008)
Cathepsin H	+ Guha and Padh (2008)
Cathepsin K					+ Moatsou (2010)
Cathepsin L	+ Guha and Padh (2008)	+ Travis and Fritz (1991)		+ Lah et al. (1996)
Cathepsin G	+ Considine et al. (2002); Campbell et al. (1989)	+ Baggiolini et al. (1978); Considine et al. (2002); Dewald et al. (1975)
Cathepsin S	+ Guha and Padh (2008)	+ Owen and Campbell (1999)
Elastase	+Owen and Campbell (1999); Prin-Mathieu et al. (2002); Campbell et al. (1989)	+ Baggiolini et al. (1978); Considine et al. (2000); Dubin et al. (1994); Owen and Campbell (1999); Travis and Fritz (1991); Prin-Mathieu et al. (2002)	+ Prin-Mathieu et al. (2002)
Other enzymes
Catalase					+ Kitchen (1976)
Lipoprotein lipase	+ Azzara and Dimick (1985b)	+ Azzara and Dimick (1985b)
Collagenase	+ Owen and Campbell (1999); Prin-Mathieu et al. (2002)	+ Verdi and Barbano (1991); Prin-Mathieu et al. (2002)
Acid phosphatase					+ Kitchen (1976); Andrews and Alichanidis (1975)
Myeloperoxidase	+ Owen and Campbell (1999)	+ Mukherjee et al. (2004)