Secreted effector that triggers a robust hypersensitive response (HR) in Lactuca serriola LS102. The response to BLN06 was visible as strong necrosis (PubMed:30251420). Although effector recognition is frequently associated with single dominant R gene loci, the recognition of BLR38 requires 2 unlinked loci that display incomplete dominance (PubMed:30251420). Has the canonical translocation motif RxLR, but lacks the canonical EER motif, which characterizes most oomycete effectors identified so far. Belongs to the RxLR effector family.