[A study of passive Ca2+ flow through the sarcoplasmic reticulum of skeletal muscles. II. Stimulation of passive Ca2+ influx with monovalent cations and anions].
The initial rate of passive Ca2+ influx into "heavy" and "light" fractions of sarcoplasmic reticulum (SR) vesicles increases in the presence of univalent cation chlorides. Stimulation of passive Ca2+ influx decreases in the following order: KCl + valinomycin-KSCN- + valinomycin greater than KSI = NaCl greater than choline chloride. K-gluconate + valinomycin and K-gluconate have no effect on the passive Ca2+ influx into SR vesicles. It is supposed that KCl-stimulation of passive Ca2+ influx into SR vesicles under conditions used may be caused by depolarization of the SR membrane.
Diadiusha
G N
GN
Tugaĭ
V A
VA
Zemlianaia
N N
NN
Zakharchenko
A N
AN
D000818:Animals; D000838:Anions / Q000494:pharmacology; D001692:Biological Transport; D002118:Calcium / Q000378:metabolism*; D002121:Calcium Channel Blockers / Q000494:pharmacology; D015220:Calcium Channels / Q000187:drug effects / Q000378:metabolism*; D002414:Cations, Monovalent / Q000494:pharmacology; D002712:Chlorides / Q000494:pharmacology*; D005942:Gluconates / Q000494:pharmacology; D066298:In Vitro Techniques; D008564:Membrane Potentials; D009132:Muscles / Q000378:metabolism*; D012519:Sarcoplasmic Reticulum / Q000378:metabolism*; D014634:Valinomycin / Q000494:pharmacology
D000838:Anions; D002121:Calcium Channel Blockers; D015220:Calcium Channels; D002414:Cations, Monovalent; D002712:Chlorides; D005942:Gluconates; D014634:Valinomycin; D002118:Calcium
Issledovanie passivnykh potokov Ca2+ cherez membranu sarkoplazmaticheskogo retikuluma skeletnykh myshts. II. Stimuliatsiia passivnogo vkhoda Ca2+ odnovalentnymi kationami i anionami.