Injection of guanosine and adenosine nucleotides into Limulus ventral photoreceptor cells
AUTOR(ES)
Bolsover, S. R.
RESUMO
1. Several nucleotide and nucleotide analogues had striking effects when pressure-injected into Limulus ventral photoreceptor cells. The poorly hydrolysable GTP analogues guanosine 5′-0-(3-thiotriphosphate) (GTPγS), guanylyl imidodiphosphate (Gpp[NH]p) and guanylyl (β, γ methylene) diphosphonate (Gpp[CH2]p) produced large increases in the frequency of `discrete events' that were recorded from photoreceptors in darkness. This effect was only observed after the injected cell was exposed to light. Injection of the ATP analogue ATPγS had effects similar to those of the GTP analogues.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1197401Documentos Relacionados
- Three components in the light-induced current of the Limulus ventral photoreceptor.
- Electrogenic Na(+)-Ca2+ exchanger, the link between intra- and extracellular calcium in the Limulus ventral photoreceptor.
- 3',5'-cyclic adenosine monophosphate and adenylate cyclase in phototransduction by limulus ventral photoreceptors.
- Internal dialysis of Limulus ventral photoreceptors.
- Kinetics of Phosphate Incorporation into Adenosine Triphosphate and Guanosine Triphosphate in Bacteria1