Chains and heterogens:
PDB Chain Sequences:
>4v3bA (A:) sktitiyldhaslptlnqlmhftkesedketarifgfsrfklpekiteqynnihfveikn nrptediftildqypekleldlhlniahsiqlfhpilqyrfkhpdrisikslnlyddgtm eyvdlekeenkdiksaikkaekqlsdylltgkinfdnptlaryvwqsqypvkyhflstey fekaeflqplktylagkyqkmdwsayeklspeqqtfylklvgfsdetkqlfhteqtkfif tgtttwegntdireyyakqqlnllkhfthsegdlfigdqykiyfkghprggdindyilkh akditnipanisfeilmmtgllpdkvggvasslyfslpkekishiiftsnkkiknkedal ndpyvrvmlrlgmidksqiifwdslkql