*loaded-organisms*
All organisms currently available for use (although more may be available for loading)
Example:
   (FOR-EACH organism IN *loaded-organisms* ...

true and success
Equivalent to T
Example:
   (ASSIGN First-sequence-in-list = TRUE)

false and failure
Equivalent to NIL

*big-number*
A very large number (set to 3.2e38)

*small-number*
A very small positive number (set to 1.0e-45)

*nucleotides*
The set ("A" "C" "G" "T")

*amino acids*
The set ("A" "C" "D" "E" "F" "G" "H" "I" "K" "L" "M" "N" "P" "Q" "R" "S" "T" "V" "W" "Y")

pi
3.14159...