# Units measure haddock score

**URL:** <https://ask.bioexcel.eu/t/units-measure-haddock-score/4253>\
**Category:** HADDOCK\
**Created:** [April 8, 2023, 12:55pm UTC](https://ask.bioexcel.eu/t/units-measure-haddock-score/4253 "2023-04-08T12:55:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![chiarel97](https://avatars.discourse-cdn.com/v4/letter/c/6de8d8/32.png) [@chiarel97](https://ask.bioexcel.eu/u/chiarel97)\
**Post date:** [April 8, 2023, 12:55pm UTC](https://ask.bioexcel.eu/t/units-measure-haddock-score/4253/1 "2023-04-08T12:55:53Z")

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Good morrning,

I’m sorry for disturbing you. I’m writing this topic since I want to ask about the units measure of the Haddock Score.

Considering the following formula: HS = 0.2 Eelec + 1.0 Evdw + 1.0 Edesolv + 0.1 EAIR, which are the units measures of:

- Haddock Score: ?
- Eelec, Evdw, Edesolv, EAIR: ? (in the literature I found kcal mol-1 but idk if it’s correct)

I also would like to know which are the units measure of:

- BSA  
-Z score

Thank you very much for your availability.

Chiara

The HADDOCK category is meant to discuss any HADDOCK-related issue. For general information about HADDOCK refer to [HADDOCK – Bonvin Lab](http://www.bonvinlab.org/software/haddock2.4)

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**Author:** ![amjjbonvin](https://dub1.discourse-cdn.com/flex013/user_avatar/ask.bioexcel.eu/amjjbonvin/32/23_2.png) [@amjjbonvin](https://ask.bioexcel.eu/u/amjjbonvin)\
**Post date:** [April 10, 2023, 2:32pm UTC](https://ask.bioexcel.eu/t/units-measure-haddock-score/4253/2 "2023-04-10T14:32:22Z")

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> Considering the following formula: HS = 0.2 Eelec + 1.0 Evdw + 1.0 Edesolv + 0.1 EAIR, which are the units measures of:
> 
> - Haddock Score: ?

We give it arbitrary units (a.u.) because it should not be interpreted as a binding affinity.  
(but kcal mol-1 would be the reasonable units)

> - Eelec, Evdw, Edesolv, EAIR: ? (in the literature I found kcal mol-1 but idk if it’s correct)
> 
> I also would like to know which are the units measure of:
> 
> - BSA

A\*\*2

> - -Z score

No units, this is purely a statistical measure (how many standard deviations you are from the mean)