Table I.

Thin filament length parameters determined by distributed deconvolution analysis of fluorescence images

Muscle type Phalloidin Nebulin M1M2M3 Tmod 
 Mean ± SD Min–max n Mean ± SD Min–max n Mean ± SD Min–max n 
 µm µm  µm µm  µm µm  
Embryonic flank          
Tmod1+/+ 1.18 ± 0.09 1.02–1.35 122 0.86 ± 0.04 0.77–0.98 57 1.23 ± 0.10 1.09–1.50 27 
Tmod1−/−Tg+ 1.19 ± 0.06 1.07–1.36 100 0.85 ± 0.04 0.75–0.97 94 1.26 ± 0.07 1.13–1.40 43 
Adult EDL          
Tmod1+/+ 1.06 ± 0.07 0.92–1.25 79 0.84 ± 0.07 0.68–1.06 50 1.11 ± 0.06 0.92–1.27 67 
Tmod1−/−Tg+ 1.07 ± 0.06 0.94–1.21 67 0.85 ± 0.04 0.75–1.00 61 1.13 ± 0.09 0.89–1.33 82 
Adult soleus          
Tmod1+/+ 1.15 ± 0.07 0.95–1.29 86 0.90 ± 0.05 0.83–1.03 50 1.22 ± 0.08 1.02–1.34 42 
Tmod1−/−Tg+ 1.16 ± 0.07 1.00–1.31 114 0.89 ± 0.03 0.81–0.96 52 1.22 ± 0.06 1.11–1.37 51 
Muscle type Phalloidin Nebulin M1M2M3 Tmod 
 Mean ± SD Min–max n Mean ± SD Min–max n Mean ± SD Min–max n 
 µm µm  µm µm  µm µm  
Embryonic flank          
Tmod1+/+ 1.18 ± 0.09 1.02–1.35 122 0.86 ± 0.04 0.77–0.98 57 1.23 ± 0.10 1.09–1.50 27 
Tmod1−/−Tg+ 1.19 ± 0.06 1.07–1.36 100 0.85 ± 0.04 0.75–0.97 94 1.26 ± 0.07 1.13–1.40 43 
Adult EDL          
Tmod1+/+ 1.06 ± 0.07 0.92–1.25 79 0.84 ± 0.07 0.68–1.06 50 1.11 ± 0.06 0.92–1.27 67 
Tmod1−/−Tg+ 1.07 ± 0.06 0.94–1.21 67 0.85 ± 0.04 0.75–1.00 61 1.13 ± 0.09 0.89–1.33 82 
Adult soleus          
Tmod1+/+ 1.15 ± 0.07 0.95–1.29 86 0.90 ± 0.05 0.83–1.03 50 1.22 ± 0.08 1.02–1.34 42 
Tmod1−/−Tg+ 1.16 ± 0.07 1.00–1.31 114 0.89 ± 0.03 0.81–0.96 52 1.22 ± 0.06 1.11–1.37 51 

Min, minimum; max, maximum. All lengths are in micrometers from the Z-line, measured from n myofibrils from three to four mice per genotype. All nebulin M1M2M3 lengths were significantly closer to the Z-line than corresponding Tmod lengths (P < 10−38). For embryonic flank phalloidin, nebulin M1M2M3, and Tmod, P = 0.08, P = 0.64, and P = 0.14, respectively. For adult EDL phalloidin, nebulin M1M2M3, and Tmod, P = 0.36, P = 0.48, and P = 0.20, respectively. For adult soleus phalloidin, nebulin M1M2M3, and Tmod, P = 0.39, P = 0.16, and P = 0.87, respectively.

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