Figure 2. ChIRP enriches for TERC RNA and detects TERC-associated telomere DNA and TCAB1 protein.
(A) TERC-asDNA probes retrieve ~88% of cellular TERC RNA and undetectable GAPDH. LacZ-asDNA probes retrieve neither RNAs. Mean ± s.d. are shown. (B) Effect of different crosslinking agents on ChIRP-southern. After 1% glutaraldehyde crosslinking, TERC retrieval co-purifies telomeric repeats, but not Alu repeats. (C) TERC ChIRP retrieves TCAB1, a known telomerase holocomplex chaperone proteins. As a negative control tubulin was not detected.