Chains and heterogens:
PDB Chain Sequences:
>1hna_ (-) pmtlgywnirglahsirllleytdssyeekkytmgdapdydrsqwlnekfklgldfpnlp ylidgthkitqsnailryiarkhnlcgesekeqiredilenqfmdsrmqlaklcydpdfe klkpeylqalpemlklysqflgkqpwflgdkitfvdfiaydvlernqvfepscldafpnl kdfisrfeglekisaymkssrflprpvftkmavfgnk