GSM8117387
Total RNA was extracted from exosome pellet using the TRIzol reagent (Invitrogen/Life Technologies) following the manufacturer's protocol. RNA concentration was quantitated using the NanoDrop ND-100 Spectrophotometer (NanoDrop Technologies, Wilmington, DE). 1) 3'-adaptor ligation;2) 5'-adaptor ligation;3) cDNA synthesis;4) PCR amplification;5) size selection of 135   155 bp PCR amplified fragments (corresponding to 15   35 nt small RNAs).