Hi guys. I'm newbie on bioinformatics and have some questions about blastp using pdb database. While using blastp from ncbi website, I input some sequence as a query and get an output with pdb ID. The thing is I gave a specific protein sequence like 'HSQGTFTSDYSKYLDSRRAQDFVQWLMNT' which corresponds to pdb ID '1GCN' sequence, expecting i'll get the same pdb ID but i cannot find that one in the result list. On the other hand, when i enter the sequence 'TTCCPSIVARSNFNVCRLPGTPEAICATYTGCIIIPGATCPGDYAN' that is for '1CRN', this one is shown up in the result list. Why is it like that? What am I doing wrong? I can't sleep because I'm so curious about that and I'm so inquisitive. Please help me to sleep. Thank you so much.