Build Model for High resolution Cryo-EM Density Maps

Choose file  select *.mrc file (<= 2GB)
Choose file  select *.fasta file (protein, DNA, and RNA are supported; use one FASTA record per polymer chain)

Build Model for High resolution Cryo-EM Density Maps without sequence

Choose file  select *.mrc file (<= 2GB)

Build Model with Given Main Chain for High resolution Cryo-EM Density Maps

Choose file  select *.mrc file (<= 2GB)
Choose file  select *.pdb file (given backbone but unknow amino acid types)