[Chimera-users] question about using swapaa in Chimera

Hi, I'm currently learning to use Chimera. I wish to look at specific amino acid mutations in CDKN2A for effects in conformational changes and changes in protein interactions with known partners. When I type the command "swapaa P #0:24" in chimera to mutate arginine 24 to proline in CDKN2A, I get an error message that says "Value error: No connectivity template for residue P" Can you help me with this issue? Thanks. David Ng, M.D. Staff Clinician