{HEAD ~ The cell supernatant} or the solution obtained after {TAIL ~ centrifugation} of the mixture obtained on breaking the cells, which contains proteins, nucleic acids and other cell constituents, is enriched in proteins, including the polypeptides of the invention, in a manner which is known per se 
obtained after
{ HEAD ~ The cell supernatant } or the solution obtained after { TAIL ~ centrifugation } of the mixture obtained on breaking the cells , which contains proteins , nucleic acids and other cell constituents , is enriched in proteins , including the polypeptides of the invention , in a manner which is known per se
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