Exporting to text files

I have dose response data analyzed with the package 'drc'.
'summary(mymodel)' prints my kinetic parameters.  I want
that text in an ASCII text file.  I want to get exactly what I
would get if I copied and pasted from the terminal window.

I've read the documentation on data export to text files here:
https://cran.r-project.org/doc/manuals/r-release/R-data.html#Export-to-text-files

write() does not work.

summary(mymodel)

Model fitted: Michaelis-Menten (2 parms)

Parameter estimates:

              Estimate Std. Error t-value  p-value
d:(Intercept)  213.435     67.094  3.1811 0.009801 **
e:(Intercept)   94.493     59.579  1.5860 0.143820
---
Signif. codes:  0 ?***? 0.001 ?**? 0.01 ?*? 0.05 ?.? 0.1 ? ? 1

Residual standard error:

 22.03492 (10 degrees of freedom)

write(summary(mymodel), "kinetics.txt")

Error in cat(x, file = file, sep = c(rep.int(sep, ncolumns - 1), "\n"),  :
  argument 1 (type 'list') cannot be handled by 'cat'

If I try to unlist(mymodel):

write(unlist(summary(mymodel)), "kinetics.txt")

I get the following contents of "kinetics.txt":

485.537711262143
4501.62443636671
3821.31920509004
3821.31920509004
3549.67055527084
213.435401944579
94.4931993582911
67.0941460663053
59.5791117361684
3.18113299681396
1.58601222147673
0.00980057624097692
0.143819823442402
MM.2()
continuous
10
4.63571040101587
3.93514151059103
3.93514151059103
3.65540149913749
Michaelis-Menten
2
22.0349202690217
10


How do I get the output of 'summary(mymodel)' verbatim? Why doesn't it
work the way I think it does? What documentation should I read to
understand what's going on here?