[Conditions of spontaneous gelatinization of sarcoplasmic proteins].
Ca2+ ions at low concentration (10(-4)-10(-5) M) when added to ultracentrifugates of sarcoplasmic proteins with minimal content of sarcoplasmic reticulum fragments completely prevent protein gelatinization or gels, formed in these conditions, quickly dilute. Ca2+ ions at the concentration of 10(-3) M prevented in these conditions gelatinization in all the cases studied. Strong gels of sarcoplasmic proteins are formed afterwards in weak acid (pH 6.1-6.75), neutral (pH 7.0) and weak alkaline (pH 7.25-7.45 and higher) media. It is suggested that gelatinization of sarcoplasmic proteins is closely related with the development of plastic tonus, obturatory muscle function and viscous after-effect.
D000818:Animals; D002118:Calcium; D055598:Chemical Phenomena; D002621:Chemistry; D005782:Gels; D006863:Hydrogen-Ion Concentration; D009124:Muscle Proteins; D009132:Muscles / Q000502:physiology; D009994:Osmolar Concentration; D011817:Rabbits; D012519:Sarcoplasmic Reticulum
D005782:Gels; D009124:Muscle Proteins; D002118:Calcium
Ob usloviiakh spontannogo Zhelirovaniia sarkoplaszmaticheskikh belkov