// hairpin between E1 and E2
constraint I39.N I50.O        2.3 2.7 3.2
constraint I39.O I50.N        2.3 2.7 3.2

constraint L41.N I48.O        2.3 2.7 3.2
constraint L41.O I48.N        2.3 2.7 3.2

//hairpin between E2.5 and E3
constraint E85.N K94.O        2.3 2.7 3.2
constraint E85.O K94.N        2.3 2.7 3.2

constraint E87.N Y92.O        2.3 2.7 3.2
constraint E87.O Y92.N        2.3 2.7 3.2


//hairpin between E4 and E5
constraint T123.N V130.O     2.3 2.7 3.2
constraint T123.O V130.N     2.3 2.7 3.2

constraint V121.N V132.O     2.3 2.7 3.2
constraint V121.O V132.N     2.3 2.7 3.2

// E3 and E4 in paralllel
constraint E95.O Q124.N      2.3 2.7 3.2

constraint S93.N Q124.O      2.3 2.7 3.2
constraint S93.O Q122.N      2.3 2.7 3.2

constraint L91.N Q122.O      2.3 2.7 3.2
constraint L91.O K120.N      2.3 2.7 3.2