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. Author manuscript; available in PMC: 2009 Dec 1.
Published in final edited form as: Reproduction. 2009 Mar 31;137(6):923–929. doi: 10.1530/REP-09-0015

Figure 3. In vivo Promoter Occupancy of the Hspa1b gene in Mature Spermatozoa.

Figure 3

In mature spermatozoa, the promoter of the mouse Hspa1b gene is bound by a number of transcription factors known to be important for expression of this gene. There are two heat shock elements (HSEs) located at −140 and −110 that are known binding sites for HSF1 and HSF2 and a GC box located at −50 that is bound by SP1. RNA Polymerase II is also bound to the proximal promoter region of Hspa1b and further demonstrates the transcriptional readiness of this gene.