hemiprotonated

adjective1

1. •
   protonated at only half of the possible sites (typically, 1 of 2)

   • The so-called i-motif structure is formed from C-rich oligonucleotides at mild acidic conditions, which enables the formation of hemiprotonated cytosine-cytosine + base pairs (Fig 4A ) [64 ]. — 2015