For glucose estimation in blood, the mode of transpo from a PHC to lab:: (A) Sodium fluoride, (B) EDTA, (C) Citrate, (D) 0.9% saline
Answer is B. Zinc finger motiff The specificity involved in the control of transcription requires that regulatory proteins bind with high affinity to the Correct region of DNA. Three unique motifs - The helix-turn-helix - Zinc finger - The leucine zipper accounts for many of this specific protein DNA interactions. So zinc finger motiff helps in binding of regulatory proteins to DNA and not in protein folding.