Mos 1,333

[rufuscat]

OK, I give up! Looked just about everywhere!
40D Protein, an important contributor to the
contractile property of muscle.
5 letters - c - i -
If you found it in a reference book or
online - please say where, ready for next time!

[Lie-in King]

40d Actin (Chambers)

[inglepingle]

actin via google

[rufuscat]

Many thanks to you both.

[yogasun]

actin

Sorry, just guessed - knew it would end in 'in'.
Checked by Googling - have a look yourself.
Therefore not much help really!

[ironmonger]

Actin
Oxford dictionary of English

[merciasounds]

You DIDN'T look everywhere, this question has been aswered onhere at least half a dozen time alredy today!!!

[rufuscat]

Thanks everyone - I must have put in the wrong search terms! Will rush out tomorrow to buy a Chambers dictionary with my 70th birthday money (today!!).

Merciasounds - did you get out of bed on the wrong side today, then? Four of us have checked and,yes, I missed
the answer at 10.50am, but there were no others that any of us could see, certainly not six. I always look through the answerbank and rarely ask a question as I try to use my
own brain where possible, for the fun of it. Mostly, of
course, I try to help with answers as many folk need
their confidence building. I fear your snappy putdown
won't help that!

[gordonclown]

Don't let them get to you.
Try " One Across-Search for Crossword Puzzle answers..."

[nanonano]

Happy Birthday Rufuscat xxx