Helixcoil transition model include the Zimm-Bragg model that describes heliz-coil transitions of marcomolecules, usually polymer cains.
Helixcoil transition models are formalized techniques in statistical mechanics developed to describe conformations of linear polymers in solution. Common transition models include the ZimmBragg model and the LifsonRoig model, and their extensions and variations. In statistical mechanics, the ZimmBragg model is a helix-coil transition model that describes helix-coil transitions of macromolecules, usually polymer chains. 
