IBYR1 A and B- links on gene expression

https://highered.mheducation.com/sites/9834092339/student_view0/chapter15/simple_gene_expression.html

https://highered.mheducation.com/sites/9834092339/student_view0/chapter16/control_of_gene_expression_in_eukaryotes.html

https://highered.mheducation.com/sites/9834092339/student_view0/chapter16/transcription_complex_and_enhancers.html