Table 4.

Regression analyses for relationships among phosphorylation ratios of signaling proteins and αs1-casein, αs2-casein, β-casein, κ-casein in bovine mammary epithelial cells cultured in media with Leu for 6 h

Dependent variable	Independent variable	P-value	Regression coefficient	R 2
αs1-casein	mTOR	0.0001	4.84738	0.7820
	GβL	0.0001	2.03558	0.5815
	Raptor	0.0052	1.15177	0.3572
	S6K1	0.0001	2.48016	0.7881
	4EBP1	0.0010	2.44002	0.4710
	eEF2	0.0001	8.14314	0.7835
	RPS6	0.0087	1.40988	0.3179
	eIF4E	0.0001	2.11775	0.6164
αs2-casein	mTOR	0.0285	0.41805	0.2200
	GβL	0.0046	0.24768	0.3663
	Raptor	0.0001	0.21865	0.6179
	S6K1	0.0008	0.29594	0.4823
	4EBP1	0.0172	0.28417	0.2630
	eEF2	0.0341	0.68184	0.2043
	RPS6	0.3133	0.08850	0.0049
	eIF4E	0.0021	0.26688	0.4225
β-casein	mTOR	0.0170	1.20726	0.2638
	GβL	0.0013	0.73002	0.4534
	Raptor	0.0001	0.60842	0.6670
	S6K1	0.0068	0.68103	0.3370
	4EBP1	0.4660	0.25321	−0.0267
	eEF2	0.0188	2.00066	0.2556
	RPS6	0.4630	−0.17444	−0.0262
	eIF4E	0.0013	0.73944	0.4531
κ-casein	mTOR	0.2831	0.82785	0.0136
	GβL	0.6733	0.15885	−0.0504
	Raptor	0.0018	0.71268	0.4338
	S6K1	0.0475	0.74591	0.1751
	4EBP1	0.2856	−0.52169	0.0128
	eEF2	0.2485	1.48963	0.0249
	RPS6	0.0626	−0.60010	0.1503
	eIF4E	0.0017	1.03420	0.4375