Table 3.
Overall phospholipid head group class composition of the erythrocyte and platelet plasma membrane from various mammals
| Phospholipid | Erythrocytes
|
Platelets
|
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Guinea pig | Sheep | Cat | Camel | Dog | Goat | Pig | Cow | Buffalo | Man | Pig | |
| CPs | 55.3 (55.6) | 54.2 (55.6) | 56.4 (55.6) | 54.1 (55.6) | 59.5 (61.0) | 46.3 (44.4) | 50.7 (50.0) | 52.5 (55.6) | 52.5 (55.6) | 56.3 (55.6) | 56.6 (55.6) |
| APs | 16.4 (16.7) | 18.0 (16.7) | 21.4 (22.2) | 23.2 (22.2) | 18.1 (16.7) | 25.6 (27.8) | 19.6 (22.2) | 15.4 (16.7) | 11.6 (11.1) | 16.2 (16.7) | 16.1 (16.7) |
| PE | 28.3 (27.8) | 27.8 (27.8) | 22.2 (22.2) | 22.7 (22.2) | 22.4 (22.2) | 28.1 (27.8) | 29.7 (27.8) | 32.4 (33.3) | 35.9 (33.3) | 27.5 (27.8) | 27.3 (27.8) |
The head group class distributions were calculated from published data (27–32). Unidentified lipids, present in sheep, camel, and goat erythrocytes (4.8, 3.4, and 0.8 mol %, respectively), were excluded from the analysis, and the percentages of the other lipids were corrected accordingly to add to 100%. The data fits collectively to the equations: xCP = nCP⋅5.56 + 0.45 ± 1.5; xAP = nAP⋅5.56 − 0.3 ± 1.5; xPE = nPE⋅5.56 − 0.15 ± 1.2 (nCP + nAP + nPE = 9), where x and n⋅5.56 are the observed and the closest predicted mole fractions, respectively. The last figures are standard deviations.