2-[(3S)-3-amino-3-carboxypropyl]-L-histidine zwitterion residue
2-[(3s)-3-amino-3-carboxypropyl]-l-histidine zwitterion residue
A 2-(3-amino-3-carboxypropyl)-<small>L</small>-histidine zwitterion obtained by transfer of a proton from the amino to the carboxy group of 2-[(3<i>S</i>)-3-amino-3-carboxypropyl]-<small>L</small>-histidine residue.