Here we provide the ORAC tpg and prm files for lipids.  This force
field is an update of CHARMM parameters for lipids by Jämbeck et al.,
called "Slipids", which is in turn an adjustment of CHARMM36 for
hydrophobic chain torsional and non-bonded parameters, recently
developed for fully saturated phospholipids[1] and then adjusted for
monounsaturated lipids.[2]


1 . J. P. M. Jämbeck and A. P. Lyubartsev. Derivation and systematic validation
    of a refined all-atom force field for phosphatidylcholine lipids. The Journal
    of Physical Chemistry B, 116(10):3164–3179, 2012.



2 . J. P. M. Jaembeck and A. P. Lyubartsev. An Extension and Further Vali-
    dation of an All-Atomistic Force Field for Biological Membranes. J. Chem.
    Theory Comput., 8(8):2938–2948, 2012

