I've evaluated my X-ray structure using MolProbity and found some issues. I want to understand how to fix these problems. Navigate to the 'Fix up structure' page. What are the two primary methods for inputting a structure for fixing? What are the key steps or options presented to the user on this page before the fixing process begins, specifically related to adding hydrogens and flipping residues?
Navigate to 'molprobity.biochem.duke.edu'. Click on the 'Fix up structure' link (ID 28). Identify and list the different methods provided for inputting a PDB file for fixing. Identify and list at least two key options or steps presented to the user *before* the structure fixing process begins, focusing on hydrogen addition and residue flipping.
The agent successfully navigates to the 'Fix up structure' page. The agent identifies at least two PDB input methods, such as 'Upload from local disk', 'Retrieve from PDB by ID', or 'Paste PDB text'. The agent identifies at least two pre-fixing options or steps related to adding hydrogens and flipping residues, such as 'Add hydrogens' and 'MolProbity flip Asn, Gln, and His residues'.