trkD
BBa_K629005 Version 1 (Component)
trkD, a functional Kup (formerly TrkD) system took up Cs+ with a moderate rate and affinity

iGEM Parts Registry
igem_collection Version 1 (Collection)
The iGEM Registry is a growing collection of genetic parts that can be mixed and matched to build synthetic biology devices and systems. As part of the synthetic biology community's efforts to make biology easier to engineer, it provides a source of genetic parts to iGEM teams and academic labs.

iGEM 2019 Part Library
iGEM_2019_Parts Version 1 (Collection)
The iGEM Spring 2019 distribution of parts

iGEM 2018 Part Library
iGEM_2018_Parts Version 1 (Collection)
The iGEM Spring 2018 distribution of parts