Figure 3From: Characterization, developmental expression and evolutionary features of the huntingtin gene in the amphioxus Branchiostoma floridaeSequence comparison of the N-terminus huntingtin domain structure at the level of the glutamine/proline (Q/P)-rich region in different species. The glutamine residues are outlined in green and the proline residues in red. Detail of polyQ evolution: an increasing trend of inserted glutamine residues from B. floridae to H. sapiens.Back to article page