ERBB2 and neoplasm: In a tumor model expressing high HER2 levels, the construct showed tumor uptake values of 5.99 ± 0.63, 5.12 ± 0.17, 2.83 ± 0.36, and 2.47 ± 0.38% IA/g at 1, 3, 24, and 48 h post-injection, respectively.