Chains and heterogens:
PDB Chain Sequences:
>1xl4A (A:) mtggmkpparkprilnsdgssnitrlglekrgwlddhyhdlltvswpvfitlitglylvt nalfalaylacgdvienarpgsftdafffsvqtmatigygklipigplantlvtlealcg mlglavaasliyarftrptagvlfssrmvisdfegkptlmmrlanlrieqiieadvhlvl vrseisqegmvfrrfhdltltrsrspifslswtvmhpidhhspiygetdetlrnshsefl vlftghheafaqnvharhayscdeiiwgghfvdvfttlpdgrraldlgkfheiaqhhhhh h
>1xl4A (A:) kprilnsdgssnitrlglekrgwlddhyhdlltvswpvfitlitglylvtnalfalayla cgdvienarpgsftdafffsvqtmatigygklipigplantlvtlealcgmlglavaasl iyarftrptagvlfssrmvisdfegkptlmmrlanlrieqiieadvhlvlvrseisqegm vfrrfhdltltrsrspifslswtvmhpidhhspiygetdetlrnshseflvlftghheaf aqnvharhayscdeiiwgghfvdvfttlpdgrraldlgkfheiaqhhhh
>1xl4B (B:) mtggmkpparkprilnsdgssnitrlglekrgwlddhyhdlltvswpvfitlitglylvt nalfalaylacgdvienarpgsftdafffsvqtmatigygklipigplantlvtlealcg mlglavaasliyarftrptagvlfssrmvisdfegkptlmmrlanlrieqiieadvhlvl vrseisqegmvfrrfhdltltrsrspifslswtvmhpidhhspiygetdetlrnshsefl vlftghheafaqnvharhayscdeiiwgghfvdvfttlpdgrraldlgkfheiaqhhhhh h
>1xl4B (B:) itrlglekrgwlddhyhdlltvswpvfitlitglylvtnalfalaylacgdvienarpgs ftdafffsvqtmatigygklipigplantlvtlealcgmlglavaasliyarftrptagv lfssrmvisdfegkptlmmrlanlrieqiieadvhlvlvrseisqegmvfrrfhdltltr srspifslswtvmhpidhhspiygetdetlrnshseflvlftghheafaqnvharhaysc deiiwgghfvdvfttlpdgrraldlgkfheiaqhhhh