Phase Behavior of a Simple Model for Membrane Proteins
  We report a numerical simulation of the phase diagram of a simple model for membrane proteins constrained to move in a plane. In analogy with the corresponding three dimensional models, the liquid-gas transition becomes metastable as the range of attraction decreases. Spontaneous crystallization happens much more readily in the two dimensional models rather than in their three dimensional counterparts. 
Massimo G. Noro and Daan Frenkel