Pig milk

Galactose and arabinose of unknown configuration were obtained after hydrolysis of a guanosine diphosphate sugars fraction from pig milk.85 A similar fraction from strawberry leaves produced a considerable proportion of D-xylose.69... 

A protein of Mr 55,000 in guinea pig milk lipid globule membranes appears to be similar but not identical to the bovine proteins using peptide mapping techniques and solubility in aqueous solutions as comparative criteria (Johnson et al. 1985). This protein is synthesized in a membrane-bound form and becomes progressively solubilized after incorporation into intracellular membranes (Mather et al 1984), a property shared by several other peripheral membrane proteins, e.g., the glycoprotein GP2 in the pancreas (Scheffer et aL 1980). 

Johnson, V. G., and Mather, I. H. 1985. Monoclonal antibodies prepared against PAS-I, butyrophilin and GP-55 from guinea-pig milk-fat-globule membrane bind specifically to the apical pole of secretory-epithelial cells in lactating mammary tissue. Exp. Cell Res. 156, 144-158. 

Guinea pigs milk contains a high level of LPL (20-50-fold that of cows milk), with more than 90% in the skim (Hamosh and Scow, 1971). Guinea pig LPL has been purified and found to be very similar in molecular structure and properties to the LPLs of cows and human milks (Wallinder et al., 1982 Bengtsson-Olivecrona et al., 1986). 

LPL activity in rats milk is only about 0.2% of that of guinea pigs milk, probably reflecting interspecial differences in milk secretory processes (Hamosh and Scow, 1971). Activity in dogs and cats milk is also low, of a similar order to human milk (Freed et al., 1986). 

Wallinder, L., Bengtsson, G., Olivecrona, T. 1982. Purification and properties of lipoprotein lipase in guinea pig milk. Biochim. Biophys. Acta 711, 107-113. 

The highest concentration of xanthine oxidase in mammals is found in the milk and lactating mammary gland [78, 92], although it is not known whether all species secrete the enzyme in milk. For obvious reasons, nearly all the information available refers to xanthine oxidase from bovine milk, but in fact both rat and guinea-pig milk have a higher enzyme content [92]. Table 3.2... 

Animal storage fats (mainly triacylglycerols with some dissolved cholesterol and fat soluble vitamins) will be present in meat that retains parts of the adipose tissue. Lard is a cooking fat derived from the adipose tissue of the pig. Milk fat occurs in full fat milk, cheese, cream, full fat yoghurt, butter... 

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