Proteins within the seminal fluid are crucial to keep sperm viable in the honeybee Apis mellifera

▶ The seminal fluid of honeybees is remarkably efficient at keeping sperm alive. ▶ The presence of proteins within seminal fluid and their structural integrity are crucial to keep sperm alive. ▶ The positive effect of seminal fluid proteins on sperm survival cannot be replicated using generic protein substitutes in fructose activated sperm.