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. 2018 Mar 22;9(4):436. doi: 10.1038/s41419-018-0402-7

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — a qRT-PCR analysis of the expression levels of NRBP1 in 30 pairs of fresh-frozen primary CRC tissues and their matched normal tissues adjacent to cancer tissues. Three experiments were done. NRBP1 mRNA expression was normalised to β-actin mRNA, which used as the internal reference. The data are expressed as the mean ± standard deviation. (**P < 0.01). b IHC staining to detect NRBP1. a Weak staining of NRBP1 in CRC tissues. b–d More intense staining of NRBP1 in CRC tissues. e Weak staining of NRBP1 in normal colorectal tissues. f–h More intense staining of NRBP1 in normal colorectal tissues. Red arrow indicates cytoplasm staining. Black arrow indicates nucleus staining. c The expression levels of NRBP1 protein were analysed by western blot in CRC tissue and matched normal colorectal tissue. GAPDH was used as loading control. N normal tissue, T tumour tissue, C1 protein from stomach tissue was used as positive control, C2 protein from thymus tissue was used as negative control. d Western blot was used to investigate NRBP1 protein expression in nine CRC cell lines and normal colorectal tissue