Figure 4.
Expression of Gremlin in regenerating WT and N1 limbs and during development. Gene expression in regenerating wild type (WT) and N1 limbs and embryo tissue. (A-J) In situ hybridisation showing Gremlin expression in the regeneration bud. (L-O) Unoperated limb buds illustrating Gremlin expression during limb development. (K) In situ hybridisation showing Gremlin expression in a stage 32 embryo, the expression pattern is consistent with previously published Gremlin embryo expression [30]. White arrowheads indicate approximate amputation plane, scale bar in A applies to panels A-J and scale bar in O to panels L-O. In limb panels (A-J, L-O) posterior is uppermost, and distal to the left, dr = days of regeneration. In K, anterior is to the left and dorsal uppermost. White asterisks mark areas of Gremlin expression that are developmental and unrelated to regeneration.