Antibody:	anti-CK8 (ab59400)
Detection system:	Biotinylated secondary antibody/[Strept]avidin coupled to horseradish peroxidase

Structure	Level	Pattern	Image	Note
TS23: submandibular gland	Present	Single cells	5a	Expression is in the terminal epithelial bud.

Structure	Cell Type	Level	Pattern	Image	Note
TS27: submandibular gland epithelium	acinar cell of salivary gland	Present	Single cells	5b	Expression is in a few myoepithelial and acinar cells.
TS27: submandibular gland epithelium	myoepithelial cell	Present	Single cells	5b	Expression is in a few myoepithelial and acinar cells.
TS27: submandibular duct		Present		5b	Expression is in the luminal cells of the striated ducts, initiating intercalated ducts, and differentiating terminal tubule cells.

Structure	Cell Type	Level	Pattern	Image	Note
TS28: submandibular duct		Weak		5c
TS28: sublingual gland epithelium	acinar cell of salivary gland	Weak		5c

Structure	Cell Type	Level	Pattern	Image	Note
TS28: submandibular duct		Strong	Regionally restricted	5d	Expression is in the striated duct and granular convoluted tubules.
TS28: submandibular gland epithelium	myoepithelial cell	Present	Regionally restricted	5d	Expression is in myoepithelial cells.

Structure	Level	Pattern	Image	Note
TS23: sublingual gland	Present	Single cells	5e

Structure	Cell Type	Level	Pattern	Image	Note
TS27: sublingual duct		Weak		5f
TS27: sublingual gland epithelium	myoepithelial cell	Present	Regionally restricted	5f	Expression is in myoepithelial cells.

Structure	Cell Type	Level	Pattern	Image	Note
TS28: sublingual duct		Weak		5g	There is a discrepancy between the text and the figure legend. The text states expression is absent.
TS28: sublingual gland epithelium	myoepithelial cell	Weak	Regionally restricted	5g	Expression is in a myoepithelial cells. There is a discrepancy between the text and the figure legend. The text states expression is absent.

Structure	Cell Type	Level	Pattern	Image	Note
TS28: sublingual duct		Weak		5h	There is a discrepancy between the text and the figure legend. The text states expression is absent.
TS28: sublingual gland epithelium	myoepithelial cell	Weak	Regionally restricted	5h	Expression is in a myoepithelial cells. There is a discrepancy between the text and the figure legend. The text states expression is absent.

Structure	Level	Pattern	Image	Note
TS23: parotid gland	Present	Single cells	5i	Expression is in a few cells in the epithelial bud.

Structure	Level	Pattern	Image	Note
TS27: parotid duct	Present	Regionally restricted	5j	Expression is either very weak or strong in a few cells.

Structure	Cell Type	Level	Pattern	Image	Note
TS28: parotid duct		Present	Single cells	5k
TS28: parotid gland epithelium	acinar cell of salivary gland	Present	Single cells	5k	Expression is in a few acinar cells.

Structure	Cell Type	Level	Pattern	Image	Note
TS28: parotid duct		Present		5l
TS28: parotid gland myoepithelium	myoepithelial cell	Present		5l