The later inactive X-chromosome transcribes a rna which does not code a protein= XIST. XIST is interacting with the chromosomal chromatin, forming the XIsT Barr body complex RNA staining of Xx chromosomes in murine embryonic stem cells. Red= X linked phosphoglycerate kinase(PgK), Blue= XIST B)In the early stage of development both X-chromosomes transcribe PgK and XIsT. c)In one chromosome the XIST is stabilized and this chromosome does not transcribe pgK anymore. D)After the cell finished differentiation one chromosome only transcribes XIst and no PgK anymore and the other X-chromosome only transcribes PgK and no XIsT anymoreThe later inactive X-chromosome transcribes a RNA which does not code a protein = XIST . XIST is interacting with the chromosomal chromatin , forming the XIST Barr body complex RNA staining of XX chromosomes in murine embryonic stem cells . Red = X￾linked phosphoglycerate kinase (PgK), Blue = XIST B) In the early stage of development both X-chromosomes transcribe PgK and XIST . C) In one chromosome the XIST is stabilized and this chromosome does not transcribe PgK anymore . D) After the cell finished differentiation one chromosome only transcribes XIST and no PgK anymore and the other X-chromosome only transcribes PgK and no XIST anymore