Question: what is n and c terminus in protein
[{'answer': 'amino acids', 'provenance': [{'wikipedia_id': '576704', 'title': 'N-terminus', 'start_paragraph_id': 1, 'start_character': 700, 'end_paragraph_id': 1, 'end_character': 711, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '576704', 'title': 'N-terminus', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 741, 'bleu_score': 0.9851290761715561, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4774040560785854414}, 'section': 'Section::::Abstract.'}]}]