text: Methods for performing protein sequencing
  include:
  *Edman degradation
  *Peptide mass fingerprinting
  *Mass spectrometry
  *Protease digests
  If the gene encoding the protein is known, it is currently much easier to sequence the DNA and infer the protein sequence. Determining part of a protein's amino-acid sequence (often one end) by one of the above methods may be sufficient to identify a clone carrying this gene.