I want to do model three mutant structures. My query sequence length is 532 but full sequence length is not available in RCSB PDB database. I have found 2 crystal structures from RCSB PDB database whereas one crystal structure do query cover 52-152AAs and another crystal structure do query cover 196-532AAs. My mutant positions are 76, 124, and 376 and I also taking both crystal structures for modeling mutant structure. My question is that whether I can take both structures for modeling mutant structures. Please provide me your valuable suggestions.