Dietary MEI and infusion treatment did not affect whole colonic tissue concentrations of DNA, RNA, and N and N:DNA. However, SH infusion tended (P = 0.09) to decrease whole colonic tissue RNA:N compared with LI-H2O. Likewise, whole
colonic tissue RNA:N was less (P = 0.05) for A-SH vs.A-G. Dietary MEI decreased (P = 0.02) hepatic epithelial concentration of DNA and increased N:DNA (P =0.0001) but did not affect liver RNA and N concentra tions or ruminal and intestinal mucosal concentrations of DNA, RNA, and N (Table 7). Rumen mucosal concentration of DNA was greater (P = 0.05) and N:DNA tended to be less (P = 0.07) for SH infusion compared with LI-H2O, but concentrations of RNA and N were similar. In contrast, duodenum mucosal concentration of RNA (P = 0.09) and RNA:N (P = 0.07) and hepatic RNA (P= 0.10) tended to be greater for SH infusion vs. LI-H2O, whereas concentrations of DNA and N were unchanged. Mucosal concentrations of DNA, RNA, and N in the remaining sections of the small intestine and colon were similar for SH infusion vs. LI-H2O