Table 2.

NMR index comparison. The letter in formula column refers to the label of the peak of interest.

Index	Formula
Chain length	(G + H + I + J)/G
Chain insaturation	I/(G + H + I + J)
Cholesterol/glycerol	(K + L + M)/X
Cholesterol/chains	(K + L + M)/(G + H + I + J)
Contribution to the phospholipids of
Phosphatidylserine, PS	(T + U)/(P + Q + R + T + U + V + W + Y + Z)
Phosphatidylethanolamine, PE	V/(P + Q + R + T + U + V + W + Y + Z)
Sphingomyelin and phosphatidylcholine, PCSM	S/(P + Q + R + T + U + V + W + Y + Z)
Plasmalogen, PEPL	(Y + Z)/(P + Q + R + T + U + V + W + Y + Z)
Sugar to phospholipids ratio	(N + O)/(P + Q + R + T + U + V + W + Y + Z)