Table 1. Relationship between... | Rockefeller University Press

Table 1.

Relationship between contraction time and ATPase activity of myosin in cat muscles

Muscle	Contraction time	Actin-activated ATPase activity	Ca²⁺-activated ATPase activity
	(ms)	(μmol P_i/mg/min)	(μmol P_i/mg/min)
Flexor hallucis longus	27	0.55	0.36
Vastus intermedius	70	0.24	0.16
Soleus	75	0.17	0.15

Muscle	Contraction time	Actin-activated ATPase activity	Ca²⁺-activated ATPase activity
	(ms)	(μmol P_i/mg/min)	(μmol P_i/mg/min)
Flexor hallucis longus	27	0.55	0.36
Vastus intermedius	70	0.24	0.16
Soleus	75	0.17	0.15

Values for contraction time were obtained from Buller et al. (1960). Contraction time was measured at 37°C, whereas both actin-activated and Ca²⁺-activated ATPase activities were measured at 25°C. Table is modified from Table I in Bárány (1967).

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