PROBLEM TO BE SOLVED: To provide an excellent antimicrobial agent, and an excellent prophylactic/therapeutic drug or the like for immune diseases, urologic diseases, digestive diseases or respiratory diseases.SOLUTION: There are disclosed a peptide of an amino acid sequence identical to or substantially identical to an amino acid sequence represented by a specific sequence, or a salt thereof an antimicrobial agent comprising the peptide or a salt thereof and a method for screening a prophylactic/therapeutic drug for immune diseases, urologic diseases, digestive diseases or respiratory diseases, which method is characterized by employing the peptide or its salt and a protein comprising an amino acid sequence identical to or substantially identical to an amino acid sequence represented by a different specific sequence number, or a salt thereof.COPYRIGHT: (C)2012,JPO&INPIT【課題】優れた抗菌剤、または優れた免疫疾患、泌尿器疾患、消化器疾患または呼吸器疾患の予防・治療剤などを提供する。【解決手段】特定の配列で表されるアミノ酸配列と同一もしくは実質的に同一のアミノ酸配列からなるペプチドまたはその塩;該ペプチドまたはその塩を含有する抗菌剤;および該ペプチドまたはその塩および、他の特定の配列番号で表されるアミノ酸配列と同一もしくは実質的に同一のアミノ酸配列を含有する蛋白質またはその塩を用いることを特徴とする、免疫疾患、泌尿器疾患、消化器疾患または呼吸器疾患の予防・治療剤のスクリーニング方法。【選択図】なし
