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APBS Updated

APBS is a software package for modeling biomolecular solvation through solution of the Poisson-Boltzmann equation (PBE), one of the most popular continuum models for describing electrostatic interactions between molecular solutes in salty, aqueous media.

Version 1.3 (2010-10)
New features
Added in new read and write binary (gz) commands. Can read gzipped DX files directly.
  • Added new write format to output the atomic potentials to a flat file (see atompot)
  • Added new functionality for using a previously calculated potential map for a new calculation.
  • Added a new program for converting delphi potential maps to OpenDX format. tools/mesh/del2dx
  • Updated Doxygen manual with call/caller graphs. Replaced HTML with PDF.
  • Added tools/matlab/solver with simple Matlab LPBE solver for prototyping, teaching, etc.
  • Deprecated APBS XML output format.
  • Deprecated nlev keyword.
  • Added etol keyword, which allows user-defined error tolerance in LPBE and NPBE calculations (default errtol value is 1.0e-6).
  • Added more explanatory error messages for the case in which parm keyword is missing from APBS input file for apolar calculations.
  • Added a polar and apolor forces calculation example to examples/born/ .
  • Added warning messages for users who try to compile APBS with --enable-tinker flag and run APBS stand-alone execution.
  • Switched default Opal service urls from to NBCR.
  • Added a sanity check in routines.c: 'bcfl map' in the input file requires 'usemap pot' statement in the input file as well.
  • Introduced Vpmgp_size() routine to replace F77MGSZ call in vpmg.c
  • Updated test results for APBS-1.3 release.
  • Bug fixes
    • Modified Vpmg_dbForce with some grid checking code provided by Matteo Rotter.
    • Fixed a bug in per Michael Lerner's suggestion. The old version of gives wrong cglen and fglen results in special cases (e.g., all y coordinates are negative values).
    • Fixed a bug in examples/scripts/ the condition for "Passed with rounding error" is abs(difference) < errortol, not the other way around.
    • Fixed the help string in .
    • Fixed a bug in Vacc_atomdSASA(): the atom SASA needs to be reset to zero displacement after finite melement methods.
    • Fixed a bug in Vpmg_dbForce(): the initialization of rtot should appear before it is used.
    • Fixed a bug in initAPOL(): center should be initialized before used.
    • Fixed a bug in routines.c: eliminated spurious "Invalid data type for writing!" and "Invalid format for writing!" from outputs with "write atompot" statement in the input file.
    • Fixed a bug in vpmg.c: fixed zero potential value problem on eges and corners in non-focusing calculations.
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