Notes:

1. - Chocolate coloured text are the what to do(s).


2. - SpringGreen coloured text are some ideas reflecting parts of the philosophy
      behind a particular function, calculation and/or option done by the MSDsite.


3. Entries in the MSD database whether they are proteins or nucleic acids are denoted
   by a 4-letter code such as 1DHF (a DHFR entry), 1GCI (a serine protease entry) ..etc.


4. Ligands which can be defined as compounds in contact (binding) with main entries'
   molecule(s) are labeled as Heteros and denoted by 3-letter identification codes (ID)
   such as FOL, MTX and TOP.