Table 1. Summary of kinetic and fluorescence intensity data.
Particle(s) | Fluorescent protein(s) | Treatment | # Expts/# Cells | Events analyzed | # Events | Lifetime | % Lifetime | % Max fluorescence |
DI-T | σ2 | 1/3 | DI-T | 62 | 47+/−13 s | ND | ND | |
DI-T+VSV | σ2 | 1/4 | pits | 212 | 35+/−10 s | 100+/−24 | 100+/−23 | |
DI-T | 36 | 43+/−14 s | 128+/−37** | 119+/−38** | ||||
VSV | 29 | 75+/−22 s | 224+/−68** | 148+/−48** | ||||
LCa | 1/3 | pits | 209 | 44+/−19 s | 100+/−34 | 100+/−26 | ||
DI-T | 48 | 44+/−14 s | 100+/−30 | 99+/−26 | ||||
VSV | 34 | 89+/−36 s | 222+/−104** | 130+/−38** | ||||
DI-T+VSV | σ2 | +latB | 2/4 | pits | 193 | 47+/−14 s | 100+/−27 | 100+/−27 |
+latB | DI-T | 46 | 54+/−21 s | 118+/−46* | 133+/−42** | |||
+latB | VSV entry | 20 | 141+/−104 s | 298+/−198** | 207+/−59** | |||
+latB | trapped VSV | 31 | 615+/−216 s | 1283+/−430** | 192+/−73** | |||
DI-T | LCa + cortactin | 1/3 | pits | 155 | 51+/−19 s | 100+/−34 | 100+/−50 | |
DI-T | 30 | 65+/−28 s | 129+/−63* | 130+/−63* | ||||
1/3 | pits | 220 | 52+/−24 s | 100+/−36 | 100+/−66 | |||
VSV | LCa + cortactin | VSV | 21 | 166+/−63 s | 335+/−105** | 300+/−164** |
Kinetic and fluorescence values are provided as the mean +/− SD for all events in a given context. The number of experiments and cells analyzed is indicated. The absolute lifetimes are expressed in seconds (s). The % lifetime and % maximum fluorescence intensity values were calculated as described in the legend of Figure 3C. The % maximum fluorescence intensity of cortactin is provided for events analyzed in cells co-expressing mCherry-LCa and cortactin-eGFP. A two-tailed Student's t-test was used to determine whether data from 2 categories differ in a statistically significantly manner.
(*) denotes a statistical difference with a p-value <0.005 and >0.00005 when comparing data in a given category to data for pits lacking virus in the same category.
(**) similarly denotes a p-value <0.00005. All values for VSV are significantly different (p<0.005 for % max AP-2 fluorescence; p<0.00005 for all other categories) from those measured for DI-T particles in the same context. ND, not determined.