text: MemBuilder supports four different force fields optimized for molecular simulation of lipids including GROMOS96 43a1 (van Gunsteren et al., 1996), GROMOS96 43a1-S3 (Chiu et al., 2009; Pandit et al., 2008), GROMOS96 53a6 (Oostenbrink et al., 2004) and Slipid/amber (Jambeck and Lyubartsev, 2012a, b, c).