part of has part interferon receptor activity type III interferon binding type III interferon receptor activity GO:0034348 Note that IL-28A, IL-28B, and IL-29 are types of interferon-lambda. molecular_function interferon-lambda receptor activity Combining with a type III interferon and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity. Interferon lambda is the only member of the type III interferon found so far. type III interferon-mediated signaling pathway