1 In the All or part of the file name box, type officeav.dll. 2  In the Look in box, click Local Hard Drives. 3  Click Search. When the search result is displayed in the right pane, note the path of the Officeav.dll file.  Locate the Officeav.dll file, right-click officeav.dll, and then click Rename.
The hair shaft made of a protein called keratin is tough and resistant to wear and tear. Eighteen amino acids make up the keratin of which the most abundant is the cysteine. It gives the hair much of its strength. The middle layer of the hair is the cortex. It is made up of polypeptide chains that are cross-linked with each other, by three different types of side bonds.
1 ï Hard keratin: These are mainly found in nail, hair cortex, hair cuticle; the keratin type seen at these sites have very little flexibility owing to the presence of many cysteine disulfide crosslinks. 2  9. 24. 2  K15 ï K15 keratin is a basal keratinocyte keratin and hair follicle stem cell marker. ï 3  In comparison to K5 and K14, K15 is completely restricted to the basal cell layer of stratified squamous epithelia. ï 4  It is also expressed in the basal keratinocytes of the hair follicle bulge region.