Hi, everyone: I'm trying to get the force field for sphingomyelin by modifying the force filed of DPPC from Dr. Peter Tieleman's website. But for LJ pairs, there's no description for LC2--OA, N--LP2, N--LH1 and OA--LH1 in the [pairs] section from lipid.itp. Where can I get the parameters for these pairs? Thank you in advance. DJ
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