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Update first steps
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lafita committed Jul 22, 2015
commit 9b6123b2ad7235c735210e1dfab1fbdaba4057c5
14 changes: 7 additions & 7 deletions structure/firststeps.md
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First Steps
===========

## First steps
## First Steps

The simplest way to load a PDB file is by using the [StructureIO](http://www.biojava.org/docs/api/org/biojava/nbio/structure/StructureIO.html) class.

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-DPDB_DIR=/wherever/you/want/
</pre>

## Memory consumption
## Memory Consumption

Talking about startup properties, it is also good to mention the fact that many PDB entries are large molecules and the default 64k memory allowance for Java applications is not sufficient in many cases. BioJava contains several built-in caches which automatically adjust to the available memory. As such, the more memory you grant your Java applicaiton, the better it can utilize the caches and the better the performance will be. Change the maximum heap space of your Java VM with this startup parameter:

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</tr>
</table>

## Asymmetric unit and Biological Assembly
## Asymmetric Unit and Biological Assembly

By default many people work with the *asymmetric unit* of a protein. However for many studies the correct representation to look at is the *biological assembly* of a protein. You can request it by calling

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This topic is important, so we dedicated a [whole chapter](bioassembly.md) to it.

## I loaded a Structure object, what now?
## I Loaded a Structure Object, What Now?

BioJava provides a number of algorithms and visualisation tools that you can use to further analyse the structure, or look at it. Here a couple of suggestions for further reads:

+ [The BioJava Cookbook for protein structures](http://biojava.org/wiki/BioJava:CookBook#Protein_Structure)
+ How does BioJava [represent the content](structure-data-model.md) of a PDB/mmCIF file?
+ [How to calculate a protein structure alignment using BioJava](http://biojava.org/wiki/BioJava:CookBook:PDB:align)
+ How to calculate a protein structure alignment using BioJava: [tutorial](alignment.md) or [cookbook](http://biojava.org/wiki/BioJava:CookBook:PDB:align)
+ [How to work with Groups (AminoAcid, Nucleotide, Hetatom)](http://biojava.org/wiki/BioJava:CookBook:PDB:groups)


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Navigation:
[Home](../README.md)
| [Book 3: The Protein Structure modules](README.md)
| [Book 3: The Structure modules](README.md)
| Chapter 2 : First Steps

Prev: [Chapter 1 : Installation](installation.md)

Next: [Chapter 3 : data model](structure-data-model.md)
Next: [Chapter 3 : Structure Data Model](structure-data-model.md)