The number of theoretically possible fatty acids with the same chain length but different structures can be determined with the aid of the famous Fibonacci sequence.
The ability to calculate the number of possible fatty acids is of great importance for their chemical analysis (‘lipidomics’) and a new paper states the number of possible fatty acids with increasing chain length rises at each step by a factor that agrees with what is called the ‘Golden Ratio’
. The Golden Ratio is essentially a ratio that is the midpoint between asymmetry and symmetry, when "the whole is to the larger as the larger is to the smaller". In numerical terms, it is 1.618.