Table I.

Collisional quenching of integration intermediates with two nascent chain TMSsa

PMPb TMSC-PMP separationc nd −MLT Ksve +MLT Ksve ΔKsv 
   M−1 ± SD M−1 ± SD M−1 
2TML53K2163 3.1 ± 0.2 3.4 ± 0.3 0.3 ± 0.4 
2TML53K2166 1.8 ± 0.3 4.0 ± 0.1 2.2 ± 0.3 
2TML53K2171 11 2.2 ± 0.2 4.2 ± 0.2 2.0 ± 0.3 
2TML53K2171 (+PK, RNase) 11 0.6 ± 0.4 3.2 ± 0.2 2.6 ± 0.4 
2TML12K2122 2.8 ± 0.1 3.2 ± 0.2 0.4 ± 0.2 
2TML12K2126 2.0 ± 0.2 4.0 ± 0.3 2.0 ± 0.4 
2TML12K2130 11 1.9 ± 0.1 3.9 ± 0.2 2.0 ± 0.2 
2TML12K2148 29 1.7 ± 0.1 4.2 ± 0.3 2.5 ± 0.3 
2TML12KN122 2.0 ± 0.5 4.6 ± 0.2 2.6 ± 0.5 
1.5TML53K1.5163 15 3.4 ± 0.0 3.6 ± 0.1 0.2 ± 0.1 
1.5TML53K1.5171 23 3.6 ± 0.3 3.8 ± 0.1 0.2 ± 0.3 
2DUPL54K2159 4.0 ± 0.2 4.1 ± 0.1 0.1 ± 0.2 
2DUPL54K2162 2.0 ± 0.1 4.1 ± 0.1 2.1 ± 0.1 
2INVL54K191 1.1 ± 0.1 3.4 ± 0.4 2.3 ± 0.4 
2INVL54K194 3.1 ± 0.4 3.4 ± 0.1 0.3 ± 0.4 
2INVL54K2163 4.0 ± 0.1 4.0 ± 0.1 0.0 ± 0.1 
2INVL54K2166 1.9 ± 0.0 4.2 ± 0.2 2.3 ± 0.2 
PMPb TMSC-PMP separationc nd −MLT Ksve +MLT Ksve ΔKsv 
   M−1 ± SD M−1 ± SD M−1 
2TML53K2163 3.1 ± 0.2 3.4 ± 0.3 0.3 ± 0.4 
2TML53K2166 1.8 ± 0.3 4.0 ± 0.1 2.2 ± 0.3 
2TML53K2171 11 2.2 ± 0.2 4.2 ± 0.2 2.0 ± 0.3 
2TML53K2171 (+PK, RNase) 11 0.6 ± 0.4 3.2 ± 0.2 2.6 ± 0.4 
2TML12K2122 2.8 ± 0.1 3.2 ± 0.2 0.4 ± 0.2 
2TML12K2126 2.0 ± 0.2 4.0 ± 0.3 2.0 ± 0.4 
2TML12K2130 11 1.9 ± 0.1 3.9 ± 0.2 2.0 ± 0.2 
2TML12K2148 29 1.7 ± 0.1 4.2 ± 0.3 2.5 ± 0.3 
2TML12KN122 2.0 ± 0.5 4.6 ± 0.2 2.6 ± 0.5 
1.5TML53K1.5163 15 3.4 ± 0.0 3.6 ± 0.1 0.2 ± 0.1 
1.5TML53K1.5171 23 3.6 ± 0.3 3.8 ± 0.1 0.2 ± 0.3 
2DUPL54K2159 4.0 ± 0.2 4.1 ± 0.1 0.1 ± 0.2 
2DUPL54K2162 2.0 ± 0.1 4.1 ± 0.1 2.1 ± 0.1 
2INVL54K191 1.1 ± 0.1 3.4 ± 0.4 2.3 ± 0.4 
2INVL54K194 3.1 ± 0.4 3.4 ± 0.1 0.3 ± 0.4 
2INVL54K2163 4.0 ± 0.1 4.0 ± 0.1 0.0 ± 0.1 
2INVL54K2166 1.9 ± 0.0 4.2 ± 0.2 2.3 ± 0.2 
a

RTC preparation and spectroscopic analyses are described in Materials and methods.

b

PMP topogenic sequences and NBD locations are shown in Figs. 2 A and 3 G.

c

TMSC, C-terminal end of TMS nearest the PTC; TMSC–PTC separation, nascent chain residues between TMSC and the PTC.

d

n, number of independent experiments.

e

–MLT and +MLT, data obtained prior to or after, respectively, melittin addition.

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