Changes in Adenylate Nucleotides Concentration and Na⁺, K⁺-ATPase Activities in Erythrocytes of Horses in Function of Breed and Sex

Table 1

Concentration of adenine nucleotides: ATP, ADP, AMP ($\mu$M), total adenylate nucleotide pool (TAN) and values of the adenylate energy charge (AEC) in erythrocytes of stallions Wielkopolska breed (W), Hanoverian breed (H), Ardenian breed (A) Legend: $\bar{x}$-mean; ±SD—standard deviation; ^**-significant difference ($P<.01$); *-significant difference ($P<.05$), $n$-group size.

Group	$n$		ATP	ADP	AMP	TAN	AEC	RBC [${10}^{12}$/L]	Hb [g/L]
			$\mu {\text{M}}_{{\rm M}\text{RBC}}$
W	8	$x$	178.3	28.3	5.5	212.1	0.91	8.31	98
		$\pm$SD	12.5	3.8	1.6	14.7	0.013	0.39	9.1
H	8	$x$	155.0	24.9	4.3	184.2	0.91	8.01	91
		$\pm$SD	11.3	4.2	0.8	13.0	0.012	0.76	3.8
A	10	$x$	148.7	29.5	5.5	183.8	0.89	7.71	77
		$\pm$SD	12.9	2.8	0.5	15.3	0.006	0.97	2.8
Statistical significance			W, A^**	A, H*	A, H*	W, H*	H, A^**	W, A*	W, ${\text{A}}^{*}$
of the group differences			W, H*			W, A*	W, A*		A, H*