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Effect of heparin on the attachment of amphotropic or Env-deficient MLV to CHO-WT or to proteoglycan-deficient CHOpgsA-745 cells. Virus binding to wild-type and proteoglycan-deficient CHO cells was equivalent in the absence of heparin (Hep−) and was similarly inhibited in the presence of 100 U of heparin/ml (Hep+).
