REE label Fiber 1 Fiber 2 Fiber 3 Fiber 4 Fiber 5 Average countsb 141Pr-Ab-Myosin 2562a 2726 2835 3198 1976 2659 ± 200 167Er-Ab-IL6 178 273 345 299 233 266 ± 28 171Yb-Ab-GAPDH 105 126 160 138 110 127 ± 10 103Rh-DNA 877 712 1482 776 1132 996 ± 141 a Data are represented as counts for each respective mass analyzed (103, 141, 167, and 171 AMU). b Average counts for each REE label ± SEM.

Table 1: ICP-QQQ data from single, REE-labeled muscle fibers.