// hairpin between E1 and E2
constraint V38.N T51.O   2.3 2.7 3.2
constraint V38.O T51.N   2.3 2.7 3.2

constraint E40.N K49.O   2.3 2.7 3.2
constraint E40.O K49.N   2.3 2.7 3.2

constraint N42.N T47.O   2.3 2.7 3.2
constraint N42.O T47.N   2.3 2.7 3.2


//hairpin between E4 and E5
constraint Q124.O R131.N  2.3 2.7 3.2
constraint Q124.N R131.O  2.3 2.7 3.2
constraint Q126.N Q129.O  2.3 2.7 3.2
constraint Q126.O Q129.N  2.3 2.7 3.2
constraint T133.N Q122.O  2.3 2.7 3.2
constraint T133.O Q122.N  2.3 2.7 3.2



// E3 and E4 in paralllel
constraint L91.CB V121.CB     4 5.12 9 
constraint Y92.CB Q122.CB     4 5.12 9
constraint S93.CB T123.CB     4 5.12 9
constraint K94.CB Q124.CB     4 5.12 9