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Table 3 Physicochemical features of channels

From: Anatomy of enzyme channels

EC Hydropathy Polarity N(+) N(-) Δ
EC1 -0.64 ± 0.05 14.2 ± 0.4 3 2 1
EC2 -0.97 ± 0.06 17.2 ± 0.4 3 2 1
EC3 -1.05 ± 0.05 17.2 ± 0.4 3 2 0
EC4 -1.05 ± 0.08 17.4 ± 0.6 3 2 1
EC5 -1.07 ± 0.11 17.9 ± 0.9 3 2 1
EC6 -1.30 ± 0.15 20.7 ± 1.3 4 2 1
All -0.92 ± 0.03 16.5 ± 0.2 3 2 0
Internal -1.11 ± 0.04 18.7 ± 0.3 1 1 0
Middle -0.78 ± 0.03 15.4 ± 0.2 1 0 0
External -1.25 ± 0.04 18.8 ± 0.3 1 1 0
  1. The average hydropathy and polarity are shown for each enzyme class as well as for the internal, middle and external parts of channels. Also shown are the median number of charged amino acid side chains lining the channels (N(+): positive Arg, Lys and His, N(-): negative Asp and Glu, and Δ: median of overall charge). Bold values indicate features of all channels.