This isn't homework. Just studying for an exam and I'd like to know ALL the variables. The question (from a past paper) asks for biological and technical reasons. I only have 3 biological (Bi) and one technical (T) reason(s).
- [mRNA] not connected to protein turnover (Bi)
- gene expression doesn't always lead to protein products (Bi)
- long-life proteins may be present while their mRNAs could be degraded and absent due to the related gene being switched off at the time of sampling. (Bi)
- integral membrane proteins are difficult to extract and would show deceptively low abundance (T)
Edited by janapix, 08 June 2012 - 08:08 PM.