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. Author manuscript; available in PMC: 2017 Jan 5.
Published in final edited form as: ACS Sens. 2016 Aug 10;1(8):975–978. doi: 10.1021/acssensors.6b00396

Figure 1.

Figure 1

Schematic view of Gd3+ chelated with 1,4,7,10-tetraaza-cyclododecane-1,4,7,10-tetraaminophosphonate (DOTA-4AmP8-) in a Gd44-G5 PAMAM dendrimer with rhodamine (Rho) and Bt-pHLIP conjugation. Gd44-G5 is linked with Bt-pHLIP through sulphur-sulphur bond.