Table 1. Effect of RPL7 and RPL31 alleles on Ty1his3AI retromobility.

Genotype	Rate of Ty1his3AI Retromobilitya ± SE × 10−7	Relative Ty1his3AI Retromobility Rate
RPL7A RPL7B	1.01 ± 0.23	1.0
rpl7a∆ RPL7B	<0.08	<0.08
RPL7A rpl7b∆	1.07 ± 0.20	1.1
rpl7a∆ rpl7b∆::RPL7A	0.13 ± 0.03	0.1
rpl7a∆::RPL7B rpl7b∆	0.82 ± 0.18	0.8
rpl7a∆::RPL7B RPL7B	0.77 ± 0.26	0.8
RPL7A rpl7b∆::RPL7A	0.82 ± 0.21	0.8
RPL31A RPL31B	0.68 ± 0.29	1.0
rpl31a∆ RPL31B	0.03 ± 0.05	0.05
rpl31a∆::RPL31B rpl31b∆	0.79 ± 0.35	1.2

^aMedian number of His⁺ prototrophs per cell per generation.