ide ▁b onds . ▁It ▁fol ds ▁into ▁a ▁t ert i ary ▁structure ▁with ▁pre domin antly ▁beta - str ands . ▁The ▁col lagen ▁IV ▁C 4 ▁domain ▁is ▁composed ▁of ▁two ▁similarly ▁fol ded ▁sub dom ains ▁stabil ised ▁by ▁ 3 ▁int rach ain ▁dis ul ph ide ▁b onds ▁involving ▁the ▁following ▁pairs : ▁C 1 - C 6 , ▁C 2 - C 5 , ▁and ▁C 3 - C 4 . ▁Each ▁sub domain ▁represents ▁a ▁compact ▁dis ul ph ide - st abil ised ▁tri angular ▁structure , ▁from ▁which ▁a ▁finger - like ▁hair pin ▁loop ▁projects ▁into ▁an ▁in comple t ely ▁formed ▁six - str and ed ▁beta - sheet ▁of ▁an ▁adjacent ▁sub domain ▁of ▁the ▁same ▁or ▁of ▁an ▁adjacent ▁chain ▁cl amp ing ▁the ▁sub dom ains ▁tight ly ▁together . ▁ ▁References ▁ ▁Category : Pro te in ▁domains <0x0A> </s> ▁Mur ud ▁( , ▁also ▁Roman ized ▁as ▁M ū r ū d ) ▁is ▁a ▁village ▁in ▁As ara ▁R ural ▁District , ▁As ara ▁District , ▁Kar aj ▁County , ▁Al bor z ▁Province , ▁Iran . ▁At ▁the ▁ 2 0 0 6 ▁census , ▁its ▁population ▁was ▁ 4 9 0 , ▁in ▁ 1 1 1 ▁families . ▁ ▁References ▁▁ ▁Category : Pop ulated ▁places ▁in ▁Kar aj ▁County <0x0A> </s> ▁But te ▁F alls ▁Second ary ▁School ▁is ▁a ▁public ▁high ▁school ▁in ▁But te ▁F alls , ▁Oregon ,