* Toppar stream for ceramides and spingomyelins; requires flex format files
* top_all36_lipid.rtf and par_all36_lipid.prm
*

! REFERENCES
!
! PSM and SSM Lipids
!
! Venable, R.M., B. Rogaski, H. Rui, A.D. MacKerell, Jr., R.W. Pastor, & J.B. Klauda. 
! An Experimentally Validated All-atom Force Field for Sphingomyelin. In prep. (2013).
!
! Ceramide                         
!
! Submited by Sam Tonddast-Navaei of U. Cincinnati. Advised by Russell Devane  
!

!set nat ?NATC
!set app
!We're exploiting what is arguably a bug in the parser. On the left hand side,
!the quotes have proirity, so NAT is correctly substituted. On the right hand
!side, the ? has priority and NATC" (sic) is not a valid substitution...
!if "@NAT" ne "?NATC" if @nat ne 0 set app append

read rtf card append
* cer/sm residues
*
36  1

! Ceramides

MASS  -1  NHL       14.00700 N !
MASS  -1  CTO1      12.01100 C !
MASS  -1  CEL3      12.01100 C !
MASS  -1  CTO2      12.01100 C !

end

return


