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. 2010 Dec 1;228(1-2):25–37. doi: 10.1016/j.quaint.2010.06.020

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© 2010 Elsevier Ltd.

Open Access under CC BY 4.0 license

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Fig. 1 — d/l values of Asx, Glx, Ser, Ala, Val and Phe, and [Ser]/[Ala] for the Free Amino Acid (FAA; bF; left) and Total Hydrolysable Amino Acid (THAA; bH*; right) fraction of bleached (intra-crystalline) Valvata piscinalis shells and Bithynia shells and opercula from Clacton (C), Waverley Wood (WW) and West Runton (WR). The species of Bithynia analysed from Clacton is B. tentaculata, but B. troschelii at Waverley Wood and West Runton. For each site, the base of the box indicates the 25th percentile. Within the box, the solid line plots the median and the dashed line shows the mean. The top of the box indicates the 75th percentile. Where more than 9 data points are available, the 10th and 90th percentiles can be calculated (shown by lines below and above the boxes respectively). The results of each duplicate analysis are included in order to provide a statistically significant sample size. The y-axes for the [Ser]/[Ala] data are plotted in reverse, so that the direction of increased protein degradation for each of the indicators remains the same. Note different scales on the y-axes.

Fig. 1 — d/l values of Asx, Glx, Ser, Ala, Val and Phe, and [Ser]/[Ala] for the Free Amino Acid (FAA; bF; left) and Total Hydrolysable Amino Acid (THAA; bH*; right) fraction of bleached (intra-crystalline) Valvata piscinalis shells and Bithynia shells and opercula from Clacton (C), Waverley Wood (WW) and West Runton (WR). The species of Bithynia analysed from Clacton is B. tentaculata, but B. troschelii at Waverley Wood and West Runton. For each site, the base of the box indicates the 25th percentile. Within the box, the solid line plots the median and the dashed line shows the mean. The top of the box indicates the 75th percentile. Where more than 9 data points are available, the 10th and 90th percentiles can be calculated (shown by lines below and above the boxes respectively). The results of each duplicate analysis are included in order to provide a statistically significant sample size. The y-axes for the [Ser]/[Ala] data are plotted in reverse, so that the direction of increased protein degradation for each of the indicators remains the same. Note different scales on the y-axes.