title: The incorporation of 32 P into spectrin aggregates following incubation of erythrocytes in 32 P-labelled inorganic phosphate.
abstract: 32P was incorporated into spectrin by incubation of fresh erythrocytes with 32Pi and glucose. The dimer and tetramer aggregates revealed only covalently-bound incorporation of phosphorus, while a higher aggregate of spectrin revealed both covalent and non-covalent incorporation. The specific activity of the covalently-bound phosphorus in all oligomers was identical, suggesting that the state of association is independent of phosphorylation. The non-covalent incorporation was shown to be due to the association of ATP with this higher aggregate. The nucleotide appers not to be bound directly to spectrin but rather to component 5 (erythrocyte actin) which is also found to be associated with this highly aggregated spectrin structure.
mesh_terms: D000199:Actins / Q000378:metabolism; D000241:Adenosine / Q000378:metabolism; D000255:Adenosine Triphosphate / Q000378:metabolism; D004910:Erythrocyte Membrane / Q000378:metabolism; D004912:Erythrocytes / Q000378:metabolism*; D006801:Humans; D066298:In Vitro Techniques; D008565:Membrane Proteins / Q000378:metabolism*; D010710:Phosphates / Q000378:metabolism*; D011487:Protein Conformation; D013049:Spectrin / Q000378:metabolism*
chemical_list: D000199:Actins; D008565:Membrane Proteins; D010710:Phosphates; D013049:Spectrin; D000255:Adenosine Triphosphate; D000241:Adenosine