Chains and heterogens:
PDB Chain Sequences:
>2iv2X (X:) mkkvvtvcpycasgckinlvvdngkivraeaaqgktnqgtlclkgyygwdfindtqiltp rlktpmirrqrggklepvswdealnyvaerlsaikekygpdaiqttgssrgtgnetnyvm qkfaravigtnnvdccarvahgpsvaglhqsvgngamsnaineidntdlvfvfgynpads hpivanhvinakrngakiivcdprkietariadmhialkngsniallnamghviieenly dkafvasrtegfeeyrkivegytpesveditgvsaseirqaarmyaqaksaailwgmgvt qfyqgvetvrsltslamltgnlgkphagvnpvrgqnnvqgacdmgalpdtypgyqyvkdp anrekfakawgveslpahtgyriselphraahgevraayimgedplqtdaelsavrkafe dlelvivqdifmtktasaadvilpstswgehegvftaadrgfqrffkavepkwdlktdwq iiseiatrmgypmhynntqeiwdelrhlcpdfygatyekmgelgfiqwpcrdtsdadqgt sylfkekfdtpnglaqfftcdwvapidkltdeypmvlstvrevghyscrsmtgncaalaa ladepgyaqintedakrlgiedealvwvhsrkgkiitraqvsdrpnkgaiymtyqwwiga cnelvtenlspitktpeykycavrvepiadqraaeqyvideynklktrlreaala
>2iv2X (X:) mkkvvtvcpycasgckinlvvdngkivraeaaqgktnqgtlclkgyygwdfindtqiltp rlktpmirrqrggklepvswdealnyvaerlsaikekygpdaiqttgssrgtgnetnyvm qkfaravigtnnvdccarvahgpsvaglhqsvgngamsnaineidntdlvfvfgynpads hpivanhvinakrngakiivcdprkietariadmhialkngsniallnamghviieenly dkafvasrtegfeeyrkivegytpesveditgvsaseirqaarmyaqaksaailwgmgvt qfyqgvetvrsltslamltgnlgkphagvnpvrgqnnvqgacdmgalpdtypgyqyvkdp anrekfakawgveslpahtgyriselphraahgevraayimgedplqtdaelsavrkafe dlelvivqdifmtktasaadvilpstswgehegvftaadrgfqrffkavepkwdlktdwq iiseiatrmgypmhynntqeiwdelrhlcpdfygatyekmgelgfiqwpcrdtsdadqgt sylfkekfdtpnglaqfftcdwvapidkltdeypmvlstvrevghyscrsmtgncaalaa ladepgyaqintedakrlgiedealvwvhsrkgkiitraqvsdrpnkgaiymtyqwwpey kycavrvepiadqraaeqyvideynklktrlreaala