>5YNY_1|Chains A, B, C, D|Allergen Der f 21|Dermatophagoides farinae (6954) MHHHHHHSSGLVPRGSEDKWRNAFDHMLMEEFEEKMDQIEHGLLMLSEQYKELEKTKSKELKEQILRELTIAENYLRGALKFMQQEAKRTDLNMFERYNFETAVSTIEILVKDLAELAKKVKAVKSDD