Partition coefficient for various single anchor chains embedded in a membrane consisting of model DPPC, DOPC, and cholesterol. The mole fractions of the chain anchors in the liquid-order and liquid-disorder phases are xlo and xld, respectively. The number of carbons in the chain is n. (A) The temperature is 290 K. The concentrations of the lo phase are xc = 0.48, xs = 0.30, and xu = 0.22, whereas those of the ld phase are xc = 0.27, xs = 0.21, and xu = 0.52. (B) The temperature is 300 K. The concentrations of the lo phase are xc = 0.52, xs = 0.26, and xu = 0.22, whereas those of the ld phase are xc = 0.32, xs = 0.22, and xu = 0.46.