Table 1.

Characteristic proteins of fibrocytes.

Protein	Function	Strongly expressing	References
Caldesmon	Calcium modulation	Type III	Mahendrasingam et al. (2011a)
S-100	Calcium modulation	Type I, II and V	Suko et al. (2000) and Mahendrasingam et al. (2011a)
Na, K-ATPase	Sodium/potassium transport	Type II and V	Suko et al. (2000) and Mahendrasingam et al. (2011a)
Ca, ATPase	Calcium transport	Type I	Ichimiya et al. (1994)
Na, K, Cl-cotransporter	Sodium/potassium/chloride transport	Type II, IV and V	Qu et al. (2006)
NCBE	Bicarbonate transporter		Huebner et al. (2019)
GLAST	Glutamate transport		Jin et al. (2003) and Furness et al. (2009)
Kir5.1	Potassium channel	Type II, IV, and V	Hibino et al. (2004)
Ether-a-gogo	Potassium channel		Nie et al. (2005)
Kv3.1	Potassium channel		So et al. (2001)
BK channels	Potassium channel		Liang et al. (2003)
ClC	Chloride channels		Qu et al. (2006)
Connexin 26, 30, 31, 43	Gap junction channel		Forge et al. (2003)
AQP1	Water channel	Type III	Miyabe et al. (2002) and Mahendrasingam et al. (2011a)
Carbonic anhydrase	Carbon dioxide-water converter	Type I, III, IV and V	Spicer and Schulte (1991)
Creatine kinase	ADP-ATP cycling	Type I, III, IV and V.	Spicer and Schulte (1991)
Connective tissue growth factor (CTGF)	Collagen metabolism	Type IV	Adams (2009)

Table illustrating some of the proteins known to be of functional relevance in fibrocytes and often used to characterize the different types.