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Table 4

Quantitative Comparison of MT Number and Cross-sectional Area of Axons

Experiments#1#2
MT numberArea of axonsnMT numberArea of axonsn
tau+/+map1b+/+ 7.8 ± 0.4 0.091 ± 0.006 223 6.7 ± 0.2  0.068 ± 0.003 322 
tau−/−map1b+/+ 5.7 ± 0.2 0.089 ± 0.005 227 6.8 ± 0.3  0.082 ± 0.005 239 
tau+/+map1b−/− 5.6 ± 0.2 0.060 ± 0.003 425 5.2 ± 0.2  0.067 ± 0.003 480 
tau−/−map1b−/− 2.4 ± 0.1 0.035 ± 0.002 710 2.6 ± 0.1 0.036 ± 0.002 663 
Experiments#1#2
MT numberArea of axonsnMT numberArea of axonsn
tau+/+map1b+/+ 7.8 ± 0.4 0.091 ± 0.006 223 6.7 ± 0.2  0.068 ± 0.003 322 
tau−/−map1b+/+ 5.7 ± 0.2 0.089 ± 0.005 227 6.8 ± 0.3  0.082 ± 0.005 239 
tau+/+map1b−/− 5.6 ± 0.2 0.060 ± 0.003 425 5.2 ± 0.2  0.067 ± 0.003 480 
tau−/−map1b−/− 2.4 ± 0.1 0.035 ± 0.002 710 2.6 ± 0.1 0.036 ± 0.002 663 

MT number and area of axons (μm2) per axon were measured directly on electron-microscopic micrographs of anterior commissure sections in two independent experiments (#1 and #2). The mice were killed at postnatal week 4. The means ± SEM are shown. n, Number of axons examined.

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