Fig. 1From: Expression of Sonic Hedgehog and pathway components in the embryonic mouse head: anatomical relationships between regulators of positive and negative feedbackExpression patterns for Shh and Hh pathway components in developing organs of the embryonic mouse head. A Simplified schematic of Hh signaling. See "Introduction" section for details. B–F in situ hybridizations for Shh (B), Gli1 (C), Ptch1 (D), Ptch2 (E), and Hhip (F) in adjacent coronal sections of the mouse at E15.5. Arrowheads in F denote additional hair folliclesBack to article page