opsin.newick <- "(K02315:1.0,(((K03494:0.01102,(Z22218:0.02551,M13305:0.01918):0.02568):0.0529,(M92036:0.10771,(((L11867:0.04787,M90075:0.04443):0.03804,(U12025:0.03546,U12024:0.03083):0.09483):0.01674,(U08131:0.03238,M62903:0.06372):0.03889):0.0225):0.02172):0.30285,((M92039:0.11603,M13299:0.09036):0.34447,((M92037:0.19778,(S66838:0.09894,L11864:0.12521):0.08389):0.18755,(((M92038:0.10886,M92035:0.11081):0.02094,(L11865:0.03836,L11866:0.05773):0.09929):0.02435,(M63632:0.07742,((S27231:0.04088,L07770:0.05902):0.03589,(D00702:0.05681,(((A48191:0.03454,L11863:0.06155):0.04872,U12328:0.09886):0.06074,((K00506:0.01815,A30407:0.01949):0.01219,(M55171:0.02431,(S32696:0.01388,K02281:0.02728):0.0016):0.00518):0.03677):0.00466):0.00811):0.05686):0.07065):0.1661):0.09599):0.1443):0.2164);"