Here's a biblatex format for Genes & Immunity (a Nature imprint) which I needed recently:
The following code in the preamble does almost all of the hard lifting:
\usepackage[backend=biber,hyperref=true,doi=true,url=false,isbn=false,maxbibnames=6,minbibnames=6,sorting=none,firstinits=true,terseinits=true,autocite=inline,style=numeric-comp]{biblatex}
\renewbibmacro{in:}{%
\ifentrytype{article}{}{%
\printtext{\bibstring{in}\intitlepunct}}}
% from http://tex.stackexchange.com/questions/12806/guidelines-for-customizing-biblatex-styles
\DeclareCiteCommand{\parencite}[\mkbibbrackets]
{\usebibmacro{cite:init}%
\usebibmacro{prenote}}
{\usebibmacro{citeindex}%
\usebibmacro{cite:comp}}
{}
{\usebibmacro{cite:dump}%
\usebibmacro{postnote}}
\DeclareMultiCiteCommand{\parencites}[\mkbibbrackets]{\parencite}{\multicitedelim}
\DeclareFieldFormat
[article,inbook,incollection,inproceedings,patent,thesis,unpublished,manual]
{title}{#1\isdot}
\DeclareFieldFormat{journaltitle}{\mkbibemph{#1}}
\DeclareFieldFormat[article,periodical]{volume}{\mkbibbold{#1}\addcolon}
\DeclareFieldFormat{year}{#1}
\DeclareNameAlias{default}{last-first}
\DeclareFieldFormat{pages}{#1}
% from http://tex.stackexchange.com/questions/17583/biblatex-remove-commas-between-last-and-first-names-in-bibliography
% remove commas between authors and first inits
\renewcommand*{\revsdnamepunct}{}
% from http://tex.stackexchange.com/questions/40798/how-do-i-get-et-al-to-appear-in-italics-when-using-textcite-or-citeauthor-w
% make et al. /et al./
\renewbibmacro*{name:andothers}{% Based on name:andothers from biblatex.def
\ifboolexpr{
test {\ifnumequal{\value{listcount}}{\value{liststop}}}
and
test \ifmorenames
}
{\ifnumgreater{\value{liststop}}{1}
{\finalandcomma}
{}%
\andothersdelim\bibstring[\emph]{andothers}}
{}}
% \renewbibmacro{journal}{#1}%
% from http://tex.stackexchange.com/questions/6743/biblatex-changing-the-order-of-entries
\renewbibmacro*{journal+issuetitle}{%
\setunit*{\addspace}%
\usebibmacro{journal}%
\setunit*{\addspace}%
\printfield{year}%
\setunit*{\addspace}%
\iffieldundef{series}
{}
{\newunit
\printfield{series}%
\setunit{\addspace}}%
\newunit{\addsemicolon\space}%
\printfield{volume}%
\setunit*{\addspace}%
\newunit
}
\renewbibmacro*{title}{%
\newunit
\ifboolexpr{
test {\iffieldundef{title}}
and
test {\iffieldundef{subtitle}}
}
{}
{\printtext[title]{%
\printfield[titlecase]{title}%
\setunit{\subtitlepunct}%
\printfield[titlecase]{subtitle}}%
\newunit}%
\printfield{titleaddon}}
\renewbibmacro*{publisher+location+date}{%
\setunit*{\addspace}%
\printtext[parens]{\printlist{location}%
\iflistundef{publisher}
{\setunit*{\addcomma\space}}
{\setunit*{\addcolon\space}}%
\printlist{publisher}%
}%
\newunit}