For transmembrane proteins, either single-pass or multi-pass, the membrane spanning part of the protein usually assumes which of the following motifs?     βαβ     αβα     α-helix     β-pleated sheet

The term subunit can be used in a variety of ways. What is the difference between a protein subunit and a ribosomal subunit?

You are studying a eukaryotic protein PKK in the lab. You fuse the DNA encoding GFP (green fluorescent protein) to the C terminus of the PKK gene. You also create the following GFP-PKK variants -GFP Wild- type: N- Signal sequence Transmembrane domain Kinase domain Variant 1: N- GFP Transmembrane domain Kinase domain Variant 2: N- -GFP Signal sequence Transmembrane domain Variant 3: N- -GFP Signal sequence Kinase domain Variant 4: N- -GFP Kinase domain If you examine wild-type PKK trafficking in a eukaryotic cell, which of the following are true? Select all that apply This fusion protein will be trafficked to the nucleus This fusion protein is a cell membrane protein This fusion protein will be trafficked to the Endoplasmic Reticulum This fusion protein is a nuclear protein

What would be the effect of a mutation that causes a poly(A)-binding protein to be nonfunctional?