Fig. 2
From: Transcriptomic insights into the genetic basis of mammalian limb diversity
Similarity of gene expression profiles within species. Heat-maps of the gene expression profiles for the fore- and hind limbs of all developmental stages for bat (a), mouse (b), opossum (c), and pig (d). FL = forelimb, HL = hind limb. The stages for each species are as follows: b_St13 = bat ridge, b_St14 = bat bud, b_St15 = bat paddle, m_StW2 = mouse ridge, m_StW3_4 = mouse bud, mStW6 = mouse paddle, o_St27 = opossum ridge, o_St28 = opossum bud, o_St29 = opossum paddle, o_St30 = opossum ridge, o_St31 = opossum bud, o_St32 = opossum paddle, p_St20 = pig ridge, p_St22 = pig bud, p_St26 = pig paddle. Branches with statistically significant clustered sub-branches (p-value < =0.05) are indicated with asterisks (*)