protoporphyrinWiktionary 原文英美构词拆解protoproto-前缀porphyrinporphyrin词干proto-An early, primitive stage of development. · Original, older.词源说明From proto- + porphyrin.释义名词noun1(biochemistry) Any porphyrin that lacks a central metal ion同族词派生词 4protoporphyrinogen·photoprotoporphyrin·protoporphyrin IX·