The structurally similar cytokines IL-2 and IL-15, and their shared beta subunit CD122, are keeping developers busy across a range of indications. Though some scientific confusion has plagued the space historically, drug candidates have drawn deals and Wall Street interest aplenty. Amgen Inc., Novartis AG, and Incyte Corp. are among those who’ve made their interest known.

Incyte Corp. has entered into an agreement to acquire Villaris Therapeutics Inc., a company developing antibody therapeutics for vitiligo.