<qa>  What is the name of the tube that contains Allprotect tissue reagent?Gingival biopsies will be collected in tubes that contain Allprotect tissue reagent 100 ml, Qiagen, USA, to immediately and effectively stabilize the DNA in tissues, based on the manufacturers instructions. Tubes containing the reagent will be stored at 2-8 C. Later DNARNA will be purified using AllPrep DNARNA Mini Kit 50 ml, Qiagen, USA, following the manufacturers instructions. With this approach, quantitative gene expression of specific cytokines is possible. 