Respected Sir/Madam.

Its Bilal here and i m doing research on a protein "rstA". I am  UCSF Chimera user and i am facing an error while energy minimization i got a pop up windows with  this error "No MMKT name of atom "HN1" in standard residue "LYS",  please help me out i am attaching my complexes with this mail as well please find the attachment.

Thank you!