Question
Filaments of this protein remain the same length by polymerizing and depolymerizing at the same rate in a process known as treadmilling. For 10 points each:
[10e] Name this protein that forms microfilaments within the cytoskeleton. This protein is “pulled” by myosin to facilitate muscle contraction.
ANSWER: actin
[10m] The concentration of this form of actin remains constant after the total concentration of actin surpasses the critical point. This monomeric form of actin acts as a reservoir for the synthesis of its “filamentous” counterpart.
ANSWER: globular actin [or G-actin]
[10h] The recruitment of G-actin to form new F-actin branches is facilitated by this protein complex, which nucleates actin polymers on existing actin filaments unlike the functionally similar protein formin. Listeria uses ActA (“act-A”) to recruit this complex in order to facilitate the formation of actin rockets.
ANSWER: Arp2/3 (“A-R-P-two-three”) complex
<Biology>
Summary
| 2024 ACF Regionals @ Cornell | 01/27/2024 | Y | 1 | 10.00 | 100% | 0% | 0% |
| 2024 ACF Regionals @ JMU | 01/27/2024 | Y | 9 | 10.00 | 89% | 11% | 0% |
| 2024 ACF Regionals @ Minnesota | 01/27/2024 | Y | 2 | 10.00 | 100% | 0% | 0% |
| 2024 ACF Regionals @ Nebraska | 01/27/2024 | Y | 6 | 10.00 | 83% | 17% | 0% |
| 2024 ACF Regionals @ Rutgers | 01/27/2024 | Y | 5 | 18.00 | 100% | 40% | 40% |
| 2024 ACF Regionals @ Vanderbilt | 01/27/2024 | Y | 5 | 14.00 | 100% | 40% | 0% |
Data
| John Jay | Columbia B | 10 | 0 | 0 | 10 |
| Columbia A | Columbia C | 10 | 0 | 10 | 20 |
| Johns Hopkins | NYU B | 10 | 10 | 10 | 30 |
| NYU A | Vassar | 10 | 10 | 0 | 20 |
| Haverford | Rowan | 10 | 0 | 0 | 10 |