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. 2015 Oct 12;43(20):9905–9917. doi: 10.1093/nar/gkv1020

Table 2. Concentrations of threonine and serine in cells subjected or not to zinc deficiency.

[Thr] (mM) [Ser] (mM) [Thr]/[Ser] Selectivity factor (Specificity Factor x[Thr]/[Ser])
-TPEN 1.19 ± 0.03 0.810 ± 0.024 1.56 ± 0.06 T1 490
+TPEN 4.1 ± 0.3 3.50 ± 0.09 1.17 ± 0.08 T2 511

Numbers indicate average ± standard deviation (n = 3).