IGF1R and urinary bladder neoplasm: However RPPA signals obtained with this anti-phosphorylated INSR/IGF1R antibody for 18 bladder tumor samples were correlated with the western-blot signals obtained with an anti-phospho-IGFR1 antibody (Pearson R = 0.68) (see methods) strongly suggesting that anti- phospho INSR/IGF1R RPPA signal did reflect IGF1R phosphorylation in bladder tumor samples.