Chains and heterogens:
PDB Chain Sequences:
>1zg3A (A:) gseeselyhaqihlykhvynfvssmalksamelgiadaihnhgkpmtlselasslklhps kvnilhrflrllthngffaktivkgkegdeeeeiaysltppskllisgkptclssivkga lhpssldmwssskkwfnedkeqtlfecatgesfwdflnkdsesstlsmfqdamasdsrmf klvlqenkrvfegleslvdvgggtggvtkliheifphlkctvfdqpqvvgnltgnenlnf vggdmfksipsadavllkwvlhdwndeqslkilknskeaishkgkdgkviiidisidets ddrgltelqldydlvmltmflgkertkqewekliydagfssykitpisgfkslievyp