title: Change in free amino acids and phospholipids in the head of adult Sarcophaga peregrina with age.
abstract: The amino acid and phospholipid contents in the head of adult Sarcophaga peregrina (flesh-fly) were measured with age. Only aspartic acid was found to increase significantly with aging. A significant difference was also detected in the fatty acid composition of the phospholipids. Phospholipids isolated from old flies contained more unsaturated fatty acid than young flies, suggesting that the properties of the membrane of head cells change with age. These changes were observed irrespective of sex or rearing conditions. Thus, it is possible that certain metabolic pathways in post-mitotic cells are selectively affected by aging.
mesh_terms: D000375:Aging; D000596:Amino Acids / Q000302:isolation & purification / Q000378:metabolism*; D000818:Animals; D004175:Diptera / Q000254:growth & development*; D006257:Head; D010743:Phospholipids / Q000302:isolation & purification / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D010743:Phospholipids