A complement C3 alpha chain proteolytic cleavage product that corresponds to the N-terminal portion after proteolytic cleavage of complement C3 alpha chain by C3 convertase. Example: UniProtKB:P01024, 672-748. [ PRO:DAN http://www.ncbi.nlm.nih.gov/pubmed/2579379 ]

Synonyms: C3/C3a C3a anaphylatoxin

This is just here as a test because I lose it