#!/usr/bin/python

import urllib,urllib2

url = 'http://www.uniprot.org/mapping/'
params = {
	'from':'ACC',
  	'to':'P_REFSEQ_AC',
  	'format':'tab',
	'query':'P13368'
}

data = urllib.urlencode(params)
print data;
request = urllib2.Request(url, data)
response = urllib2.urlopen(request)
page = response.read(200000)
print page;