Table 2. SUVs (mean ± SD) 1 hr after injection of peptide into mice.

Organ	Cleavable peptide	All-d-amino acid control peptide
Skin	0.6 ± 0.4	0.2 ± 0.3
Muscle	0.2†	0.0†
Brain	0.2†	0.1 ± 0.1
Intestine	0.6 ± 0.3	0.4 ± 0.4
Liver	1.2 ± 0.5	0.6 ± 0.1
Spleen	0.2†	0.0†
Colon	0.9 ± 0.3	0.7 ± 0.2
Lung	0.1 ± 0.1	0.0 ± 0.1
Plasma	1.4 ± 0.1	1.7 ± 0.2
Salivary	0.4 ± 0.1	0.3 ± 0.1
Kidney	5.3 ± 0.6	3.2 ± 0.9
Heart	0.2 ± 0.1	0.0†
Pancreas	0.7 ± 0.2	0.2†
Tumors (P < 0.05)	1.3 ± 0.4	0.4 ± 0.3

The cleavable peptide was [11-kDa PEG]-X-e₉-XPLG^*LAG-r₉-Xk(Cy5), and the uncleavable peptide was [11-kDa PEG]-X-e₉-Xplglag-r₉-Xk(Cy5).

^†Standard deviation was <0.05 in these samples.