>2d20B (B:) observed residues (from ATOM records)
aestlgaaaaqsgryfgtaiasgklgdsayttiasrefnmvtaenemkidatepqrgqfn
fsagdrvynwavqngkqvrghtlawhsqqpgwmqslsgstlrqamidhingvmghykgki
aqwdvvshafsddgsggrrdsnlqrtgndwievafrtaraadpaaklcyndynienwtwa
ktqgvynmvrdfkqrgvpidcvgfqshfnsgspynsnfrttlqnfaalgvdvaiteldiq
gassstyaavtndclavsrclgitvwgvrdtdswrsgdtpllfngdgskkaaytavlnal
ngggqikgvgsgrcldvpnasttdgtqvqlydchsatnqqwtytdagelrvygdkcldaa
gtgngtkvqiyscwggdnqkwrlnsdgsivgvqsglcldavgggtangtliqlyscsngs
nqrwtrt