Enumerations for _Gen_dist_constraint_list.Constraint_type (An open enumeration) 
disulfide bond 'Disulfide bond distance constraints' 
general distance 'Specific distance constraint is not known' 
hydrogen bond 'Hydrogen bond distance constraints' 
NOE 'Distance constraints determined from NOE experiments' 
NOE build-up 'Distance constraints determined from a series of NOE experiments with different mixing times' 
NOE not seen 'Distance constraints supplied when an expected NOE was not observed' 
paramagnetic relaxation 'Distance constraints determined from paramagnetic relaxation studies' 
ROE 'Distance constraints determined from ROE experiments' 
ROE build-up 'Distance constraints determine from a series of ROE experiments with different mixing times' 
symmetry 'Distance constraint enforces symmetry - for example to enforce symmetry between monomers in a multimer'