Chains and heterogens:
PDB Chain Sequences:
>1j4bA (A:) aaatgsrvtvvlgaqwgdegkgkvvdllatdadivsrcqggnnaghtvvvdgkeydfhll psgiintkavsfigngvvihlpglfeeaeknekkglkdwekrliisdrahlvfdfhqavd glqevqrqaqegknigttkkgigptysskaartglricdllsdfdefsarfknlahqhqs mfptleidvegqlkrlkgfaerirpmvrdgvyfmyealhgppkkvlveganaalldidfg typfvtssnctvggvctglgippqnigdvygvvkayttrvgigafpteqineigdllqnr ghewgvttgrkrrcgwldlmilryahmvngftalaltkldildvlseikvgisyklngkr ipyfpanqeilqkveveyetlpgwkadttgarkwedlppqaqsyvrfvenhmgvavkwvg vgksresmiqlf