text: user10680: I am new to the bioinformatics field. I have positive and negative protein sequences for acetylation PTM. Now, I want to train a classifier, say SVM. What will be the next step? How can I convert these sequences into usable features? Any information or links would help.
  >P31327_55|1|testing
  KAQTAHIVLEDGTKMKGYSFGHPSSVA
  >P31327_57|1|testing
  QTAHIVLEDGTKMKGYSFGHPSSVAGE
  >P31327_119|1|testing
  APDTTALDELGLSKYLESNGIKVSGLL
  >P31327_157|1|testing
  LATKSLGQWLQEEKVPAIYGVDTRMLT
  
  
  user1459: Just a recommendation: Be careful when making your data sets.
  P31327_57, P31327_119, P31327_157 are all annotated as "By similarity" to the mouse entry in Swiss-Prot https://www.uniprot.org/uniprot/P31327#ptm_processing, which means there is no direct experimental evidence in the human entry. If you do have publications that report experimental evidence for these PTMs, please don't hesitate to share them with the UniProt team.
  I also recommend reading this UniProt help page about using UniProt data in negative datasets if you haven't already done so: https://www.uniprot.org/help/negative_datasets
  
original_text: 10680: <p>I am new to the bioinformatics field. I have positive and negative protein sequences for acetylation PTM. Now, I want to train a classifier, say SVM. What will be the next step? How can I convert these sequences into usable features? Any information or links would help.</p>
  <pre><code>&gt;P31327_55|1|testing
  KAQTAHIVLEDGTKMKGYSFGHPSSVA
  &gt;P31327_57|1|testing
  QTAHIVLEDGTKMKGYSFGHPSSVAGE
  &gt;P31327_119|1|testing
  APDTTALDELGLSKYLESNGIKVSGLL
  &gt;P31327_157|1|testing
  LATKSLGQWLQEEKVPAIYGVDTRMLT
  </code></pre>
   1459: <p>Just a recommendation: Be careful when making your data sets.</p>
  <p>P31327_57, P31327_119, P31327_157 are all annotated as &quot;By similarity&quot; to the mouse entry in Swiss-Prot <a href="https://www.uniprot.org/uniprot/P31327#ptm_processing" rel="nofollow noreferrer">https://www.uniprot.org/uniprot/P31327#ptm_processing</a>, which means there is no direct experimental evidence in the human entry. If you do have publications that report experimental evidence for these PTMs, please don't hesitate to share them with the UniProt team.</p>
  <p>I also recommend reading this UniProt help page about using UniProt data in negative datasets if you haven't already done so: <a href="https://www.uniprot.org/help/negative_datasets" rel="nofollow noreferrer">https://www.uniprot.org/help/negative_datasets</a></p>
  