Before revision:  Other information such as (i) there is a very strong salt bridge HIS187-ARG156 (N-O) linking alpha-helices H2 and H1 (if mutation H187R is made at position 187 then the hydrophobic core of PrPC will be exposed), (ii) at D178, there is a hydrogen bond Y169-D178 and a polar contact R164-D178 for BufPrPC instead of a polar contact Q168-D178 for bovine PrPC, (iii) BufPrPC owns 3-10 helices at 125-127, 152-156 and in the beta2-alpha2 loop respectively  , etc, has been discovered.
After revision:  Other information such as (i) there is a very strong salt bridge HIS187-ARG156 (N-O) linking alpha-helices H2 and H1 (if mutation H187R is made at position 187 then the hydrophobic core of PrPC will be exposed), (ii) at D178, there is a hydrogen bond Y169-D178 and a polar contact R164-D178 for BufPrPC instead of a polar contact Q168-D178 for bovine PrPC, (iii) BufPrPC owns 3-10 helices at 125-127, 152-156 and in the beta2-alpha2 loop respectively , (iv) in beta2-alpha2 loop there are strong pi-contacts , etc, has been discovered.