Chains and heterogens:
PDB Chain Sequences:
>1yfeA (A:) mntvrsekdsmgaidvpadklwgaqtqrslehfristekmptslihalaltkraaakvne dlgllseekasairqaadevlagqhddefplaiwqtgsgtqsnmnmnevlanrasellgg vrgmerkvhpnddvnksqssndvfptamhvaallalrkqlipqlktltqtlneksrafad ivkigrthlqdatpltlgqeisgwvamlehnlkhieyslphvaelalggtavgtglnthp eyarrvadelavitcapfvtapnkfealatcdalvqahgalkglaaslmkiandvrwlas gprcgigeisipenepgssimpgkvnptqcealtmlccqvmgndvainmggasgnfelnv frpmvihnflqsvrlladgmesfnkhcavgiepnrerinqllneslmlvtalnthigydk aaeiakkahkegltlkaaalalgylseaefdswvrpeqmvgsmkagr
>1yfeA (A:) vrsekdsmgaidvpadklwgaqtqrslehfristekmptslihalaltkraaakvnedlg llseekasairqaadevlagqhddefplaiwqtgsgtqsnmnmnevlanrasellggvrg merkvhpnddvnksqssndvfptamhvaallalrkqlipqlktltqtlneksrafadivk igrthlqdatpltlgqeisgwvamlehnlkhieyslphvaelalggtavgtglnthpeya rrvadelavitcapfvtapnkfealatcdalvqahgalkglaaslmkiandvrwlasgpr cgigeisipenepgssimpgkvnptqcealtmlccqvmgndvainmggasgnfelnvfrp mvihnflqsvrlladgmesfnkhcavgiepnrerinqllneslmlvtalnthigydkaae iakkahkegltlkaaalalgylseaefdswvrpeqmv