Sutro Biopharma Inc.’s stock-perking news in early December with STRO-002, a folate receptor alpha-targeting antibody-drug conjugate (ADC) to treat ovarian cancer, reminded investors of potential in the class, which has been more than realized in recent years and could yield more upside in the near term. As of the Oct. 30 cutoff date, STRO-002 tallied one complete response and nine partial responses in the challenging indication, which works out to an overall response rate of 32% (10 out of 31) in evaluable patients.