Pfenex has deprioritized its pegfilgrastim biosimilar program but is reevaluating the market after Mylan’s recent success in the US. In June, the US Food and Drug Administration approved Mylan’s Fulphilia on its second attempt. While Fulphilia has become the first biosimilar of Amgen’s cancer drug Neulasta (pegfilgrastim), there are several other firms looking to tap the market, including Coherus and Novartis subsidiary Sandoz. Clinical-stage development and licensing biotech Pfenex too has a pegfilgrastim biosimilar in its pipeline, PF529, but announced…