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  <TITLE>
  EMBOSS: findkm
  </TITLE>
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<table align=center border=0 cellspacing=0 cellpadding=0>
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<A HREF="/" ONMOUSEOVER="self.status='Go to the EMBOSS home page';return true"><img border=0 src="/images/emboss_icon.jpg" alt="" width=150 height=48></a>
</td>
<td align=left valign=middle>
<b><font size="+6">
findkm
</font></b>
</td></tr>
</table>
<br>&nbsp;
<p>


<H2>
Wiki
</H2>

The master copies of EMBOSS documentation are available
at <a href="http://emboss.open-bio.org/wiki/Appdocs">
http://emboss.open-bio.org/wiki/Appdocs</a>
on the EMBOSS Wiki.

<p>
Please help by correcting and extending the Wiki pages.

<H2>
    Function
</H2>
Calculate and plot enzyme reaction data
<H2>
    Description
</H2>

<p><b>findkm</b> reads a file of enzymatic reaction data (substrate concentration [S] versus reaction velocity [V]) and draws Michaelis Menten and Hanes Woolf plots of the data. From these it calculates the Michaelis Menten constant (Km) and the maximum velocity (Vmax) of the reaction.  An output file with all relevant data is written.</p>

<H2>
    Usage
</H2>
Here is a sample session with <b>findkm</b>
<p>

<p>
<table width="90%"><tr><td bgcolor="#CCFFFF"><pre>

% <b>findkm -graph cps </b>
Calculate and plot enzyme reaction data
Enzyme kinetics data (application-specific) file: <b>enztest.dat</b>
Output file [enztest.findkm]: <b></b>

Created findkm.ps

</pre></td></tr></table><p>
<p>
<a href="#input.1">Go to the input files for this example</a><br><a href="#output.1">Go to the output files for this example</a><p><p>

<H2>
    Command line arguments
</H2>
<table CELLSPACING=0 CELLPADDING=3 BGCOLOR="#f5f5ff" ><tr><td>
<pre>
Calculate and plot enzyme reaction data
Version: EMBOSS:6.6.0.0

   Standard (Mandatory) qualifiers:
  [-infile]            infile     Enzyme kinetics data (application-specific)
                                  file
  [-outfile]           outfile    [*.findkm] Output file name
   -graphlb            xygraph    [$EMBOSS_GRAPHICS value, or x11] Graph type
                                  (ps, hpgl, hp7470, hp7580, meta, cps, x11,
                                  tek, tekt, none, data, xterm, png, gif, pdf,
                                  svg)

   Additional (Optional) qualifiers: (none)
   Advanced (Unprompted) qualifiers:
   -[no]plot           boolean    [Y] S/V vs S

   Associated qualifiers:

   "-outfile" associated qualifiers
   -odirectory2        string     Output directory

   "-graphlb" associated qualifiers
   -gprompt            boolean    Graph prompting
   -gdesc              string     Graph description
   -gtitle             string     Graph title
   -gsubtitle          string     Graph subtitle
   -gxtitle            string     Graph x axis title
   -gytitle            string     Graph y axis title
   -goutfile           string     Output file for non interactive displays
   -gdirectory         string     Output directory

   General qualifiers:
   -auto               boolean    Turn off prompts
   -stdout             boolean    Write first file to standard output
   -filter             boolean    Read first file from standard input, write
                                  first file to standard output
   -options            boolean    Prompt for standard and additional values
   -debug              boolean    Write debug output to program.dbg
   -verbose            boolean    Report some/full command line options
   -help               boolean    Report command line options and exit. More
                                  information on associated and general
                                  qualifiers can be found with -help -verbose
   -warning            boolean    Report warnings
   -error              boolean    Report errors
   -fatal              boolean    Report fatal errors
   -die                boolean    Report dying program messages
   -version            boolean    Report version number and exit

</pre>
</td></tr></table>
<P>
<table border cellspacing=0 cellpadding=3 bgcolor="#ccccff">
<tr bgcolor="#FFFFCC">
<th align="left">Qualifier</th>
<th align="left">Type</th>
<th align="left">Description</th>
<th align="left">Allowed values</th>
<th align="left">Default</th>
</tr>

<tr bgcolor="#FFFFCC">
<th align="left" colspan=5>Standard (Mandatory) qualifiers</th>
</tr>

<tr bgcolor="#FFFFCC">
<td>[-infile]<br>(Parameter 1)</td>
<td>infile</td>
<td>Enzyme kinetics data (application-specific) file</td>
<td>Input file</td>
<td><b>Required</b></td>
</tr>

<tr bgcolor="#FFFFCC">
<td>[-outfile]<br>(Parameter 2)</td>
<td>outfile</td>
<td>Output file name</td>
<td>Output file</td>
<td><i>&lt;*&gt;</i>.findkm</td>
</tr>

<tr bgcolor="#FFFFCC">
<td>-graphlb</td>
<td>xygraph</td>
<td>Graph type</td>
<td>EMBOSS has a list of known devices, including ps, hpgl, hp7470, hp7580, meta, cps, x11, tek, tekt, none, data, xterm, png, gif, pdf, svg</td>
<td><i>EMBOSS_GRAPHICS</i> value, or x11</td>
</tr>

<tr bgcolor="#FFFFCC">
<th align="left" colspan=5>Additional (Optional) qualifiers</th>
</tr>

<tr>
<td colspan=5>(none)</td>
</tr>

<tr bgcolor="#FFFFCC">
<th align="left" colspan=5>Advanced (Unprompted) qualifiers</th>
</tr>

<tr bgcolor="#FFFFCC">
<td>-[no]plot</td>
<td>boolean</td>
<td>S/V vs S</td>
<td>Boolean value Yes/No</td>
<td>Yes</td>
</tr>

<tr bgcolor="#FFFFCC">
<th align="left" colspan=5>Associated qualifiers</th>
</tr>

<tr bgcolor="#FFFFCC">
<td align="left" colspan=5>"-outfile" associated outfile qualifiers
</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -odirectory2<br>-odirectory_outfile</td>
<td>string</td>
<td>Output directory</td>
<td>Any string</td>
<td>&nbsp;</td>
</tr>

<tr bgcolor="#FFFFCC">
<td align="left" colspan=5>"-graphlb" associated xygraph qualifiers
</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -gprompt</td>
<td>boolean</td>
<td>Graph prompting</td>
<td>Boolean value Yes/No</td>
<td>N</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -gdesc</td>
<td>string</td>
<td>Graph description</td>
<td>Any string</td>
<td>&nbsp;</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -gtitle</td>
<td>string</td>
<td>Graph title</td>
<td>Any string</td>
<td>&nbsp;</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -gsubtitle</td>
<td>string</td>
<td>Graph subtitle</td>
<td>Any string</td>
<td>&nbsp;</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -gxtitle</td>
<td>string</td>
<td>Graph x axis title</td>
<td>Any string</td>
<td>&nbsp;</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -gytitle</td>
<td>string</td>
<td>Graph y axis title</td>
<td>Any string</td>
<td>&nbsp;</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -goutfile</td>
<td>string</td>
<td>Output file for non interactive displays</td>
<td>Any string</td>
<td>&nbsp;</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -gdirectory</td>
<td>string</td>
<td>Output directory</td>
<td>Any string</td>
<td>&nbsp;</td>
</tr>

<tr bgcolor="#FFFFCC">
<th align="left" colspan=5>General qualifiers</th>
</tr>

<tr bgcolor="#FFFFCC">
<td> -auto</td>
<td>boolean</td>
<td>Turn off prompts</td>
<td>Boolean value Yes/No</td>
<td>N</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -stdout</td>
<td>boolean</td>
<td>Write first file to standard output</td>
<td>Boolean value Yes/No</td>
<td>N</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -filter</td>
<td>boolean</td>
<td>Read first file from standard input, write first file to standard output</td>
<td>Boolean value Yes/No</td>
<td>N</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -options</td>
<td>boolean</td>
<td>Prompt for standard and additional values</td>
<td>Boolean value Yes/No</td>
<td>N</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -debug</td>
<td>boolean</td>
<td>Write debug output to program.dbg</td>
<td>Boolean value Yes/No</td>
<td>N</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -verbose</td>
<td>boolean</td>
<td>Report some/full command line options</td>
<td>Boolean value Yes/No</td>
<td>Y</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -help</td>
<td>boolean</td>
<td>Report command line options and exit. More information on associated and general qualifiers can be found with -help -verbose</td>
<td>Boolean value Yes/No</td>
<td>N</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -warning</td>
<td>boolean</td>
<td>Report warnings</td>
<td>Boolean value Yes/No</td>
<td>Y</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -error</td>
<td>boolean</td>
<td>Report errors</td>
<td>Boolean value Yes/No</td>
<td>Y</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -fatal</td>
<td>boolean</td>
<td>Report fatal errors</td>
<td>Boolean value Yes/No</td>
<td>Y</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -die</td>
<td>boolean</td>
<td>Report dying program messages</td>
<td>Boolean value Yes/No</td>
<td>Y</td>
</tr>

<tr bgcolor="#FFFFCC">
<td> -version</td>
<td>boolean</td>
<td>Report version number and exit</td>
<td>Boolean value Yes/No</td>
<td>N</td>
</tr>

</table>

<H2>
    Input file format
</H2>

The input file is a file of enzymatic data, [S] against V, Substrate
concentration against reaction velocity.

<p>

<a name="input.1"></a>
<h3>Input files for usage example </h3>
<p><h3>File: enztest.dat</h3>
<table width="90%"><tr><td bgcolor="#FFCCFF">
<pre>
  0.10   2
  0.20   4
  0.50   9
  1.00  17
  2.00  29
  5.00  50
 10.00  67
 20.00  80
 50.00  91
100.00  95
</pre>
</td></tr></table><p>


<H2>
    Output file format
</H2>


<a name="output.1"></a>
<h3>Output files for usage example </h3>
<p><h3>File: enztest.findkm</h3>
<table width="90%"><tr><td bgcolor="#CCFFCC">
<pre>
---Hanes Woolf Plot Calculations---
Slope of best fit line is a = 0.01
Coefficient in Eqn of line y = ma +b is b = 0.05
Where line cuts x axis = (-0.20, 0)
Where line cuts y axis = (0, 0.05)
Limit-point of graph for plot = (103.00, 1.08)

Vmax = 99.70, Km = 4.894612
</pre>
</td></tr></table><p>
<p><h3>Graphics File: findkm.ps</h3>
<p><img src="findkm.1.findkm.gif" alt="[findkm results]">

<H2>
    Data files
</H2>

None.
        
<H2>
    Notes
</H2>

None.

<H2>
    References
</H2>


<ol>

<li>
Voet & Voet (1993) 'Biochemistry' 

<li>
Dawes 'Quantitative Problems in Biochemistry' 5th Edition.

<li>
Manuel G. Claros, Francisco M. Canovas 
'Lines&amp;Kinetics: a graphic tool to deal with linear regressions and
enzyme kinetics.'
EMBnet.news vol 5.1
<a href="http://www.uk.embnet.org/embnet.news/vol5_1/kinetics.html">
http://www.uk.embnet.org/embnet.news/vol5_1/kinetics.html</a>

<li>
Cornish-Bowden (1996) 'Fundamentals of Enzyme kinetics'
Portland Press, London.

</ol>

<H2>
    Warnings
</H2>

None.

<H2>
    Diagnostic Error Messages
</H2>

None.


<H2>
    Exit status
</H2>

It exits with a status of 0.

<H2>
    Known bugs
</H2>

None.

<h2><a name="See also">See also</a></h2>
<table border cellpadding=4 bgcolor="#FFFFF0">
<tr><th>Program name</th>
<th>Description</th></tr>
</table>

<H2>
    Author(s)
</H2>

Sinead O'Leary formerly at:
<br>
HGMP-RC, Genome Campus, Hinxton, Cambridge CB10 1SB, UK


<p>
Please report all bugs to the EMBOSS bug team (emboss-bug&nbsp;&copy;&nbsp;emboss.open-bio.org) not to the original author.



<p>

This application was modified by 
David Martin  

<p>
Please report all bugs to the EMBOSS bug team (emboss-bug&nbsp;&copy;&nbsp;emboss.open-bio.org) not to the original author.
<H2>
    History
</H2>



Completed November 1999

<p>
Modified May 2000

<H2>
    Target users
</H2>
This program is intended to be used by everyone and everything, from naive users to embedded scripts.

<H2>
    Comments
</H2>
None

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