Chains and heterogens:
PDB Chain Sequences:
>1ngzA (A:) elvmtqtpkfmstsvgdrvsitckasqnvgtavawyqqkpgqspklliysasnrytgvpd rftgsgsgtdftltisnmqsedladyfcqqyssypltfgggtkveikrtvaapsvfifpp sdeqlksgtasvvcllnnfypreakvqwkvdnalqsgnsqesvteqdskdstyslsstlt lskadyekhkvyacevthqglsspvtksfnrge
>1ngzB (B:) qvqllesgaelvkpgasvklsckasgytftsywmhwvkqrpgrglewigridpnsggtky nekfkskatltvdkpsstaymqlssltsedsavyyctrrdsdywgagttvtvssastkgp svfplapsskstsggtaalgclvkdyfpepvtvswnsgaltsgvhtfpavlqssglysls svvtvpssslgtqtyicnvnhkpsntkvdkkvepkscdkt