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Determination of the position of end sites. (A) BglII digest of PY100 DNA. The pac fragment was excised (arrow). (B) Digest of the BglII pac fragment with DraI and a Southern blot with probe (see Fig. 5B). The arrow indicates fragments with end sites. (C) Distribution of initial cuts within the coding region of ORF2 (positions are according to PY100 sequence numbering).
