passages.id: split_1_test_1097_passage
passages.type: progene_text
passages.text: Use of a cryptic 5' splice site in exon 8 , which results in absence or presence of 15 nucleotides specifying a VSGGG peptide motif , and/or use of a cryptic 3' splice site in exon 14 , which leads to a frameshift in the mRNA reading frame , occur as independent stochastic events in all tissues examined .