On Saturday, December 31, 2016 at 10:47:34 PM UTC-5, wr=
ote:

{snip}

Doesn't look like dust is blocking view to center, if it is, the
dust is extraordinarily smooth.

It looks like it ran right through the center of the adjacent galaxy,
and lost it's black hole to the larger galaxy, with the stars
continuing on, blowing out into a spherical shell that has the
appearance of a circle.

I'm sure you already know this: the images you see on the SDSS site
are heavily processed representations of the actual SDSS data, which
can be downloaded as FITS files (all the way from the raw data to
the nicest cleaned data). Independent survey observations which may
include this galaxy are GALEX (UV), DECaLS (optical), PS1 (optical),
WISE (IR), Akari (IR), IRAS (IR), Planck (microwave), and FIRST
(1.4 GHz). This being a Virgo cluster galaxy, it may have been the
target of dedicated observations by 8-10m class facilities (e.g.
Gemini, Subaru, Keck, VLT, LBT, and GCT), as well the Hubble; if
so, some imaging data may be in the public domain (in the form of
FITS files).

One terrific thing about data - not JPG or PNG images - in the
public domain is that you can download it and do your own processing;
DS9 is great for this (although the User Manual is rather, um,
terse).

But sorting out what is really going on would be a challenge. I'll
have to read some of those papers. But it really looks like it's
a galaxy without a central massive BH............and that's unusual
if so. Wonder if one of the papers shows spectroscopy of the central
region, I'll have to check.

As PH has already noted, showing robustly that a galaxy as massive
as NGC 4435 has no central SMBH could be extraordinarily difficult,
and not just if it's quiescent.

Thanks for letting me know to click on the references to see papers.

You're welcome.