19033
The calculated molecular properties were generally maintained in all investigated peptides extracted from three - dimensional structures of Protein Data Bank ( 1t0v , 1bbp , 1kxo , 2hzr , 1iiu , 1jyj , 1gka , 1s44 , 3ebw ) when compared to Lopap - derived peptide , specially the molecular shape and electronic density distribution , validating the lipocalin sequence signature previously reported .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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