[Fatty acids of actinomycete phospholipids].

The fatty acid composition of phospholipids was studied in different actinomycetes growing in two media in order to detect their biological activity. The total phospholipids of the actinomycetes did not differ qualitatively and their composition was represented by the same series of fatty acids (C13--C19). The qualitative composition and the quantitative content of fatty acids in phospholipids depended on the composition of the growth medium. When the actinomycetes were cultivated in a complex medium, the proportion between fatty acids (C14:0, C14:1, C16:0, C17:0, C17:1, C18:1, C18:2) changed. The qualitative composition of fatty acids in phospholipids varied among the cultures. However, the content of palmitoleic, palmitic and oleic acids was elevated in all of the cultures. Under the given experimental conditions, the actinomycetes were found to synthesize phospholipids containing fatty acids with a high degree of unsaturation (mainly at the account of C16:1 and C18:1 acids).