1 HOO (2~{S})-2-azanyl-3-[2,5-bis(oxidanylidene)imidazol-4-yl]propanoic acid 1.000 2 DI6 3-[(4s)-2,5-dioxoimidazolidin-4-yl]propanoic acid 0.923 3 OHI 3-(2-oxo-2h-imidazol-4-yl)-L-alanine 0.923 4 DHI D-histidine 0.846 5 HHI (2z)-3-(1h-imidazol-5-yl)-2-iminopropanoic acid 0.846 6 HIS Histidine 0.846 7 O66 3-[(4~{R})-5-oxidanylidene-1,4-dihydroimidazol-4-yl]propanoic acid 0.846 8 2HF 2-fluoro-L-histidine 0.786 9 A1AS0 5-selanyl-L-histidine 0.786 10 A1ASZ 5-sulfanyl-L-histidine 0.786 11 A1AZ2 3-methyl-D-histidine 0.786 12 A1I9G 3(S)-methyl-histidine 0.786 13 B3U 2-amino-L-histidine 0.786 14 EI4 Enduracididine 0.786 15 HIC 4-methyl-histidine 0.786 16 HSK 3-hydroxy-L-histidine 0.786 17 MHS N1-methylated histidine 0.786 18 R2P (2r)-2-amino-3-(4-hydroxy-1,2,5-thiadiazol-3-yl)propanoic acid 0.786 19 S2P (2s)-2-amino-3-(4-hydroxy-1,2,5-thiadiazol-3-yl)propanoic acid 0.786 20 V5N (2s,3s)-2-azanyl-3-(1h-imidazol-5-yl)-3-oxidanyl-propanoic acid 0.786 21 HSO L-histidinol 0.769 22 HSV L-histidinal 0.769 23 MWQ 3-(1~{H}-imidazol-5-yl)propanoic acid 0.769 24 URO (2e)-3-(1h-imidazol-4-yl)acrylic acid 0.769 25 A1L7K (2~{S})-2-azanyl-3-[(3~{S})-2-oxidanylidenepiperidin-3-yl]propanoic acid 0.733 26 HJH (2~{S})-2-azanyl-3-(2-methyl-5-oxidanyl-1,2,3-triazol-4-yl)propanoic acid 0.733 27 OGC Gamma-N-methyl-beta-oh-histidine 0.733 28 OYL 1-ethyl-L-histidine 0.733 29 83O (2s)-2-azanyl-3-(4h-1,2,4-triazol-3-yl)propanoic acid 0.714 30 DYT (2~{S})-2-chloranyl-3-(1~{H}-imidazol-5-yl)propanoic acid 0.714 31 ECD (4r)-4-(2-carboxyethyl)imidazolidin-2-iminium 0.714 32 ELL (2s)-2-azanyl-3-[(3s)-2-oxidanylidenepyrrolidin-3-yl]propanal 0.714 33 HIA L-histidine amide 0.714 34 HIX 3-(1h-1,2,3-triazol-5-yl)-L-alanine 0.714 35 KCJ 3-(1,3-thiazol-4-yl)-L-alanine 0.714 36 Q75 Thiazole-histidine 0.714