The body fats of the pig

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Abstract
Specimens of outer back and perinephric fats from the same pig were studied after resolution into several fractions of varying degrees of solubility in acetone. The approx. molar % of the outer back fat and the perinephric fat in palmitodi-"olein" was 46-53 and 35-40 respectively; in oleo-palmito-stearin, 34-27 and 39-34; in oleo-dipalmitin, 5 and 9; in stearodi-olein, 0-7 and 0-5; in tri-oleins, 10-3 and 8-3; fully saturated glycerides, 5 and 9. The proportions of the respective groups of tri-"olein," palmitodi-"olein," "oleo"-palmitostearin, and of the fully saturated glycerides in each pig fat, together with other results strongly support the hypothesis that stearo-glycerides in these animal depot fats have resulted from saturation of preformed oleo-glycerides. Also, the observations disclose a gradual increase in the proportions of dipalmito-glycerides as the general degree of saturation of the depot fats becomes more pronounced.