Chains and heterogens:
PDB Chain Sequences:
>1karA (A:) ntiidwnsctaeqqrqllmrpaisasesitrtvndildnvkargdealreysakfdkttv talkvsaeeiaaaserlsdelkqamavavknietfhtaqklppvdvetqpgvrcqqvtrp vasvglyipggsaplfstvlmlatpasiagckkvvlcspppiadeilyaaqlcgvqdvfn vggaqaiaalafgtesvpkvdkifgpgnafvteakrqvsqrldgaaidmpagpsevlvia dsgatpdfvasdllsqaehgpdsqvilltpaadmarrvaeaverqlaelpraetarqaln asrlivtkdlaqcveisnqygpehliiqtrnarelvdsitsagsvflgdwspesagdyas gtnhvlptygytatcsslgladfqkrmtvqelskegfsalastietlaaaerltahknav tlrvnalkeqa
>1karB (B:) ntiidwnsctaeqqrqllmrpaisasesitrtvndildnvkargdealreysakfdkttv talkvsaeeiaaaserlsdelkqamavavknietfhtaqklppvdvetqpgvrcqqvtrp vasvglyipggsaplfstvlmlatpasiagckkvvlcspppiadeilyaaqlcgvqdvfn vggaqaiaalafgtesvpkvdkifgpgnafvteakrqvsqrldgaaidmpagpsevlvia dsgatpdfvasdllsqaehgpdsqvilltpaadmarrvaeaverqlaelpraetarqaln asrlivtkdlaqcveisnqygpehliiqtrnarelvdsitsagsvflgdwspesagdyas gtnhvlptygytatcsslgladfqkrmtvqelskegfsalastietlaaaerltahknav tlrvnalkeqa