AMBER Archive (2009)

Subject: Re: [AMBER] Mass of LP

From: David A. Case (case_at_biomaps.rutgers.edu)
Date: Thu Mar 19 2009 - 06:27:48 CDT

On Wed, Mar 18, 2009, PRADEEP VENKATARAMAN wrote:
>
> I am trying to simulate a system with two mass less particles having
> different vdW parameters.

This will be difficult with Amber, since it performs molecular dynamics
simulations, and dynamics implies mass.

>
> I was wondering if LP is treated the same way as EP ?

LP points have mass, and are not treated in any special way. EP points
are massless, but must be rigidly connected to real atoms -- they are
like dummy centers of force.

...dac

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