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Fig. 6 | BMC Evolutionary Biology

Fig. 6

From: Positive selection in octopus haemocyanin indicates functional links to temperature adaptation

Fig. 6

Principal component analysis for polar surface residues of octopus haemocyanin. The analysis was performed separately a) for 65 surface residues of the partial haemocyanin fragment FU f-g and b) for 19 surface residues of the partial haemocyanin fragment FU g. Surface residues were identified for the haemocyanin structural model [PDB: 1JS8] using GETAREA [97]. PCA variables comprised the total number of each type of polar surface residue as well as their total net charge. Identical colours mark octopods of the same climatic origin. Rectangles mark the centroid of the respective climatic group. PCA scores were abbreviated with species names as followed: Apo Adelieledone polymorpha, Bar Bathypolypus arcticus, Blo Benthoctopus longibrachus, Bpu Bathypolypus pugniger, Bri Benthoctopus rigbyae, Bsp Benthoctopus sp., Cma Callistoctopus macropus, Cor Callistoctopus ornatus, Eci Eledone cirrhosa, Edo Enteroctopus dofleini, Emo Eledone moschata, Gya Graneledone yamana, Hlu Hapalochlaena lunulata, Hma Hapalochlaena maculosa, Mma Macroctopus maorum, Mse Megaeledone setebos, Ome Octopus membranaceus, Ovu Octopus vulgaris, Pae Pareledone aequipillae, Pau Pareledone aurata, Pch Pareledone charcoti, Pco Pareledone cornuta, Pfe Pareledone felix, Ppa Pareledone panchroma, Ppr Pareledone prydzensis, Ptu Pareledone turqueti

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