Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phenomenological analysis of ATP dependence of motor protein   In this study, through phenomenological comparison of the velocity-force data
of processive motor proteins, including conventional kinesin, cytoplasmic
dynein and myosin V, we found that, the ratio between motor velocities of two
different ATP concentrations is almost invariant for any substall, superstall
or negative external loads. Therefore, the velocity of motor can be well
approximated by a Michaelis-Menten like formula $V=\atp k(F)L/(\atp +K_M)$,
with $L$ the step size, and $k(F)$ the external load $F$ dependent rate of one
mechanochemical cycle of motor motion in saturated ATP solution. The difference
of Michaelis-Menten constant $K_M$ for substall, superstall and negative
external load indicates, the ATP molecule affinity of motor head for these
three cases are different, though the expression of $k(F)$ as a function of $F$
might be unchanged for any external load $F$. Verifications of this
Michaelis-Menten like formula has also been done by fitting to the recent
experimental data.

7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn