8Mureabox.off: Box of 8M urea in water. Pre-equilibrated at 300K and 1 atm (NPT) for 0.5 ns. Final density 1.12 RESP charges used for urea molecule. Need to load frcmod.urea file (into Leap) which contains parameters of N - C - N angle. Alexey Onufriev Dec. 02.