adenine salvage adenosine salvage inosine salvage obsolete adenine, hypoxanthine and their nucleoside salvage true OBSOLETE. The pathway by which adenine, hypoxanthine and their nucleosides from purine nucleotides breakdown are converted back to purine nucleotides. The salvage pathway is important where there is no de-novo purine nucleotide biosynthesis. This term was made obsolete because it represents multiple processes that are represented elsewhere in the process ontology. adenine, hypoxanthine and their nucleoside salvage GO:0010140 biological_process hypoxanthine salvage