# Amber Protein FF suggestion (upgrade from amberff99SBildn)

**URL:** <https://gromacs.bioexcel.eu/t/amber-protein-ff-suggestion-upgrade-from-amberff99sbildn/4389>\
**Category:** User discussions\
**Tags:** forcefield\
**Created:** [June 30, 2022, 7:20am UTC](https://gromacs.bioexcel.eu/t/amber-protein-ff-suggestion-upgrade-from-amberff99sbildn/4389 "2022-06-30T07:20:59Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Jacek](https://avatars.discourse-cdn.com/v4/letter/j/e19adc/32.png) [@Jacek](https://gromacs.bioexcel.eu/u/Jacek)\
**Post date:** [June 30, 2022, 7:20am UTC](https://gromacs.bioexcel.eu/t/amber-protein-ff-suggestion-upgrade-from-amberff99sbildn/4389/1 "2022-06-30T07:20:59Z")

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GROMACS version: 2020  
GROMACS modification: No

Dear all,  
up until now I have been using the amberff99SBildn force field for protein simulations, but was thinking about going for a newer one.  
I’ve seen that the newest one that has been reformatted for GROMACS is amber14SB (in it’s different variants - [User contributions — GROMACS webpage https://www.gromacs.org documentation](https://www.gromacs.org/user_contributions.html)). I was also thinking about combining it with Lipid17 ([GitHub - xiki-tempula/gmx\_lipid17.ff: a gromacs port of the amber lipid force field LIPID17](https://github.com/xiki-tempula/gmx_lipid17.ff)). Currently, I’m searching the internet and literature to find what would be the best picks, so I’d appreciate any suggestions or learn from your experiences.  
Thx a lot!