Table 1. Muscle weights (mg) of Mstn and Tll2 mutant mice.

offspring	sex	n	pectoralis	triceps	quadriceps	gastrocnemius
Mstn +/+	Female	11	51.5±1.6	74.5±1.2	144.8±3.7	101.6±2.3
Mstn LoxP/LoxP	Female	10	54.7±1.9	77.5±1.4	150.1±3.9	104.6±2.6
Mstn +/D76A	Female	12	61.0±1.1 a	86.6±2.0 a	169.3±3.3 a	116.2±1.8 a
Mstn D76A/D76A	Female	10	92.7±4.3 a	134.4±4.5 a	238.1±9.3 a	162.3±5.7 a
Mstn +/−	Female	12	60.8±1.3 b	82.5±1.8 b	172.1±4.0 a	116.5±3.2 b
Mstn −/−	Female	10	106.9±4.0 a,c	146.6±4.7 a	271.9±9.6 a,c	183.4±4.7 a,d
Tll2−/−	Female	12	56.0±1.2 e	81.8±1.9 f	162.8±2.6 b	112.3±2.0 f
Mstn +/+	Male	11	78.5±3.7	101.3±3.2	196.7±7.7	137.9±4.4
Mstn LoxP/LoxP	Male	12	78.8±1.7	98.2±2.7	189.4±5.1	134.0±3.5
Mstn +/D76A	Male	15	93.5±2.5 f	120.9±3.0 b	226.2±6.9 f	157.9±3.9 f
Mstn D76A/D76A	Male	10	156.2±8.8 a	201.2±10.2 a	335.9±14.9 a	234.5±8.9 a
Mstn +/−	Male	12	95.2±2.8 f	119.4±3.7 b	238.1±6.8 b	163.8±4.0 b
Mstn −/−	Male	10	212.4±3.6 a,g	229.1±5.6 a,c	417.8±9.4 a,h	287.5±4.9 a,g
Tll2−/−	Male	15	83.1±1.1	106.1±1.6	213.1±2.9	149.1±1.1 e

^a p<0.0001 vs. wild type;

^b p<0.001 vs. wild type;

^c p<0.05 vs. Mstn ^D76A/D76A;

^d p<0.01 vs. Mstn ^D76A/D76A;

^e p<0.05 vs. wild type;

^f p<0.01 vs. wild type;

^g p<0.0001 vs. Mstn ^D76A/D76A;

^h p<0.001 vs. Mstn ^D76A/D76A