1 JM2 N~5~-[2-(methylsulfanyl)ethanimidoyl]-L-ornithine 1.000 2 JM7 N~5~-[2-(ethylsulfanyl)ethanimidoyl]-L-ornithine 0.933 3 RGE (2s)-2-amino-5-(2-(methylsulfinyl)acetimidamido)pentanoic acid 0.933 4 VUR (S)-2-amino-5-(2-mercaptoacetimidamido)pentanoic acid 0.929 5 CCW (S)-2-amino-5-(2-(methylsulfonyl)acetimidamido)pentanoic acid 0.875 6 JM5 N~5~-[2-(propylsulfanyl)ethanimidoyl]-L-ornithine 0.875 7 ILO N5-iminoethyl-L-ornithine 0.857 8 4JK (S)-2-amino-5-(2-hydroxyacetimidamido)pentanoic acid 0.800 9 FIO N~5~-[(1e)-2-fluoroethanimidoyl]-L-ornithine 0.800 10 LN5 N5-(1-iminopropyl)-L-ornithine 0.800 11 WT2 (S)-2-amino-5-(2-oxoacetimidamido)pentanoic acid 0.800 12 VIO N5-(1-imino-3-butenyl)-L-ornithine 0.750 13 4VI (2z,4e)-5-carbamimidamido-2-iminopent-4-enoic acid 0.733 14 85G N-ethyl-L-glutamine 0.733 15 AR7 Amino{[(4s)-4-amino-5,5-dihydroxypentyl]amino}methaniminium 0.733 16 ARG Arginine 0.733 17 CIR Citrulline 0.733 18 DAR D-arginine 0.733 19 GND 2-amino-5-guanidino-pentanoic acid 0.733 20 IAR (2e)-5-[(diaminomethylidene)amino]-2-iminopentanoic acid 0.733 21 ORQ N~5~-acetyl-L-ornithine 0.733 22 SCI L-thiocitrulline 0.733 23 LN6 N~5~-[(1e)-pentanimidoyl]-L-ornithine 0.706 24 LN7 N~5~-[(1s)-1-aminopentyl]-L-ornithine 0.706