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The gelation of anionic carrageenans is known to occur through a coil-to-helix transition followed by further aggregation or association on which positive counterions play a significant role. In the present work, molecular dynamics (MD) simulations were performed on two double-helical iota-carrageenan hexamer fragments along with their sodium counterions using the Carbohydrate Solution Force Field (CSFF) in an aqueous (TIP4P) solution with the GROMACS molecular dynamics package. Results showed a counterion condensation between the two