Lys pH Rel. Abs Glu pH Rel. Abs Ser pH Rel. Abs Gly pH Rel. Abs 2 0.03404 2 1 2 0.3469 2 0.24874 6 0.41506 6 0.8172 6 1 6 0.61008 7.4 0.72394 7.4 0.37204 7.4 0.99722 7.4 0.85378 9 1 9 0.03871 9 0.83626 9 1