Table 12.

Effect of zinc methionine complex in combination with zilpaterol hydrochloride on concentrations (mg/g muscle tissue) and percentages (g/100 g total fatty acids) of individual neutral lipid fatty acids (FA) and FA categories (saturated fatty acids (SFA), monounsaturated (MUFA), and polyunsaturated fatty acids (PUFA)) of neutral and polar lipid fractions (LF) from semimembranosus tissue

FA	mg/g muscle tissue				%, g/100 g total FA
	CONa	ZnMetb	SEMc	P value	CONa	ZnMetb	SEMc	P value
Total FA	22.084b	34.047a	4.907	0.046
SFA	10.225	16.537	2.285	0.054	45.988b	49.375a	0.945	0.013
14:0	0.832b	1.402a	0.194	0.041	3.745	4.222	0.182	0.061
15:0	0.125	0.198	0.026	0.051	0.589	0.600	0.026	0.766
16:0	5.813	9.333	1.255	0.051	26.130b	28.051a	0.694	0.049
17:0	0.252	0.419	0.062	0.061	1.131	1.213	0.062	0.332
18:0	3.141	5.111	0.759	0.069	14.085b	15.058a	0.539	0.190
23:0	0.013a	0.008b	0.001	0.003	0.076	0.027	0.021	0.054
MUFA	11.044	16.208	2.500	0.142	50.128a	46.635b	0.941	0.010
14:1	0.293	0.464	0.065	0.064	1.304	1.450	0.107	0.320
16:1	0.828	1.253	0.163	0.068	3.721	3.943	0.242	0.499
17:1	0.233	0.364	0.052	0.076	1.049	1.107	0.063	0.501
18:1 trans	1.089b	1.929a	0.269	0.031	5.139	5.545	0.366	0.414
18:1 cis-9	8.469	11.976	1.972	0.204	38.302a	33.911b	1.154	0.009
20:1	0.131b	0.220a	0.027	0.026	0.611	0.678	0.030	0.115
PUFA	0.815b	1.302a	0.161	0.037	3.881	3.992	0.188	0.665
18:2 n-6	0.622b	0.998a	0.123	0.033	2.987	3.058	0.155	0.733
18:3 n-3	0.038b	0.066a	0.008	0.024	0.181	0.200	0.009	0.163
20:3 n-6	0.018	0.028	0.004	0.095	0.085	0.084	0.008	0.966
20:4 n-6	0.041	0.044	0.004	0.605	0.227	0.164	0.035	0.188

Means in the same row having different letters are significant at P ≤ 0.05 due to ZnMet/CON × LF interaction

^aCON: Control 90 ppm Zn added from ZnSO₄ (n = 20 steers)

^bZnMet: Control plus 720 mg Zn added from ZINPRO^® zinc methionine (n = 20 steers)

^cPooled standard error of the mean