Antibody:	anti-CRABP1
Detection system:	Alexa Fluor 488

Structure	Level	Pattern	Image	Note
TS21: back skin	Present	Regionally restricted	1b	Expression first seen at E13.5 during earliest stage of skin development, when epidermis consists of single layer of keratinocytes. Expression in cytoplasm of cells with fibroblast-type morphology, closely associated with basal surface.
TS21: epidermis	Absent		1b	No expression in Krt14-expressing epidermal cells.

Structure	Level	Pattern	Image	Note
TS21: back skin	Present	Regionally restricted	1c

Structure	Level	Pattern	Image	Note
TS23: hair follicle dermal papilla	Strong		1d

Structure	Level	Pattern	Image	Note
TS23: dermis	Strong	Regionally restricted	1e	Strong expression in dermal condensate.

Structure	Level	Pattern	Image	Note
TS25: hair follicle dermal papilla	Present	Regionally restricted	1f	Strong expression in dermal papilla of new secondary hair pegs. Lower intensity of expression in dermal papilla of more mature primary follicles.

Structure	Level	Pattern	Image	Note
TS25: dermis	Present	Regionally restricted	1g	Expression maintained in dermal condensate, in cells concentrated at interface of dermis with epidermis.

Structure	Level	Pattern	Image	Note
TS27: back skin	Weak	Regionally restricted	1h
TS27: hair follicle dermal papilla	Present		1h	Expression remained detectable in all dermal papilla.

Structure	Level	Pattern	Image	Note
TS27: back skin	Weak	Regionally restricted	1i	Reduced intensity of expression relative to embryonic skin.
TS27: dermis	Present	Regionally restricted	1i	Expression in dermal fibroblasts at dermal-epidermal interface.

Structure	Level	Pattern	Image	Note
TS27: dermis	Weak	Regionally restricted	1j	Intensity of expression in dermal fibroblasts was lower than at P1.

Structure	Level	Pattern	Image	Note
TS28: hair follicle dermal papilla	Strong	Widespread	1l	High intensity of expression in dermal papilla of all hair follicles.
TS28: dermis	Absent		1l	Expression undetectable in dermal fibroblasts.

Structure	Level	Pattern	Image	Note
TS28: back skin	Present	Regionally restricted	1l inset	Expression in small population of cells located beneath the developing sebaceous gland, whose morphology differed from that of surrounding dermal fibroblasts.

Structure	Level	Pattern	Image	Note
TS28: hair follicle dermal papilla	Strong	Regionally restricted	1n	Strong expression in dermal papilla of telogen (resting) hair follicles.

Structure	Level	Pattern	Image	Note
TS28: hair follicle dermal papilla	Strong	Regionally restricted	1o	Strong expression in dermal papilla of anagen (growing) hair follicles.