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. 2019 May 22;47(12):6084–6097. doi: 10.1093/nar/gkz434

Table 3.

The parameters used in the calculation of the energy of polyamine molecule in the groove of the double helix

Groove width (Inline graphic), Å
Polyamine Minor groove Major groove m n Inline graphic Inline graphic(80) Inline graphic Inline graphic (80)
Putrescine2+ 6 2
Spermidine3+ 12 17 10 3 5.8 3.28 7.7 1.5
Spermine4+ 14 4