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. 2014 Dec 15;4:7476. doi: 10.1038/srep07476

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(a) The number of chains with different number of structural domains under different thresholds. The number of chains with single-, 2- and 3-domain (the blue, red and green polylines) changes more gently than that of chains with 4-domain represented by the purple polyline. (b) The proportion of chains with different number of structural domains under different thresholds. The proportion of chains with single-domain (the blue polyline) increases towards 99% but the others (the red, green and purple polylines) descend continuously. Finally, the proportion of chains with 4-domain decreases to about 0%.